victorzamora
Contributor
As others have said, get the Petrel if you can afford it and you want the absolute best. Get the DG03 if you don't need the absolute best. It's a great, solid computer. I did a lot of my training (cave and deco) with it and just recently stepped up to the Petrel. It makes a great backup even still because it's diving a very liberal algorithm (adjustable). However, it's not super user-friendly. It'll take some flipping through the manual to get it. Once you get everything set up right, it's a relative piece of cake because there's only so much you need to keep changing (for me, it's nitrox mixes).
Think about it this way.....there's a reason used Petrels ($850) sell for about $700. They're fantastic in every way. There's probably a reason that a $1000 Helo2 is selling for $300. Suunto is known for its goofy algorithms that penalize you weird for weird things. The best thing about the Petrel is it runs a clean, unfettered algorithm. It runs pure Buhlmann (ZHL-16C, I believe) or pure VPM with an unlock. The reason I mention this is because it's how you do tech dives. You plan using a full-fledged algorithm and then setting your computer to the same settings and getting them to match. You can do that with the Petrel. You can't with the Helo2. The screen is also awful on it. Stay away.
As for the DiveRite Nitek Q.....stay away. The price is nice(ish) but the screen is awful. It has this weird frame stutter/tearing/drag issue if you move it at all. My policy always is go as good as it gets or as cheap as I can get away with. If you waste your money on middle-of-the-road gear, it does little more than the cheapest gear and isn't nearly as good as the nicest.
---------- Post added September 16th, 2014 at 10:44 AM ----------
tbone, the XDeep Black is having an unprecedented number of serious issues AND there's an absurdly long wait-list for them, and they still haven't actually properly started producing them yet. The issues range from depth sensors to temp readout to crashes/freezes of the firmware, not uploading any data correctly, their special charge/synch adapter breaking and/or failing (with no replacement parts to be seen). This is certainly one I'd stay FAR FAR away from, especially now.
The Nitek Q has the issues I mentioned above (screen taring/freezing) as well as semi- and mostly-fixed computer synching features (they're not actually fully functional).
Thanks again for all the input! Also I noticed no one mentioned the Helo2. Any reason? Seems to be a good deal at $300.
Think about it this way.....there's a reason used Petrels ($850) sell for about $700. They're fantastic in every way. There's probably a reason that a $1000 Helo2 is selling for $300. Suunto is known for its goofy algorithms that penalize you weird for weird things. The best thing about the Petrel is it runs a clean, unfettered algorithm. It runs pure Buhlmann (ZHL-16C, I believe) or pure VPM with an unlock. The reason I mention this is because it's how you do tech dives. You plan using a full-fledged algorithm and then setting your computer to the same settings and getting them to match. You can do that with the Petrel. You can't with the Helo2. The screen is also awful on it. Stay away.
As for the DiveRite Nitek Q.....stay away. The price is nice(ish) but the screen is awful. It has this weird frame stutter/tearing/drag issue if you move it at all. My policy always is go as good as it gets or as cheap as I can get away with. If you waste your money on middle-of-the-road gear, it does little more than the cheapest gear and isn't nearly as good as the nicest.
---------- Post added September 16th, 2014 at 10:44 AM ----------
I can tell you right now that you will not find a Petrel in the $600-$650 range, it's just not going to happen. You MIGHT find a predator in that price range, but you lose regular AA battery use and the Rec Nitrox mode. That post in RBW is about as cheap as you'll find one...
Black BT - Dive Right in Scuba
That with nitrox unlocked puts you in the low $600's
NiTek Q - Dive Right in Scuba
Nitek Q is rechargeable and actually is a quite nice little computer now that they have the dive logging features fixed. I'm still partial to my petrel though, but it isn't cheap and I do actually use all of the features on it....
tbone, the XDeep Black is having an unprecedented number of serious issues AND there's an absurdly long wait-list for them, and they still haven't actually properly started producing them yet. The issues range from depth sensors to temp readout to crashes/freezes of the firmware, not uploading any data correctly, their special charge/synch adapter breaking and/or failing (with no replacement parts to be seen). This is certainly one I'd stay FAR FAR away from, especially now.
The Nitek Q has the issues I mentioned above (screen taring/freezing) as well as semi- and mostly-fixed computer synching features (they're not actually fully functional).