Also, search through here. I'm not convinced that Suunto quality lives up their marketing.
The Scubaboard bias is strong with you my friend.
Utter cobblers by the way
I use Both an Eon steel and a Perdix.
In comparison to the Perdix, the Eon has a way better screen display (brightness, contrast and viewing angle) It has a better build quality - the Perdix feels cheap. However if you're divign in just a rash vest then the Eon is a heavy beast.
The Perdix has a frustrating 2 button menu (one press too many and you need to go around again. The Eon has a lovely 3 button menu system an you can flip the screen to have the buttons on the left or the right (the core has them at the bottom.
Stuart will attest to the fact that it is possible (but rare) to inadvertently have the Perdix button pressed, changing things.
On both you can customise the displays to your preference, the Eon offers more variables - both are limited to the Manufacturers presets
I hate the water sensor on the Eon - we find it problematic, however asking around the issues are peculiar to us in teh Middle East (high temps, high salinity and high humidity)
Out of the 10 people I know who have one here, I'm the only one who's had a problem, my pressure sensor started acting up. No biggy it's a bit of electronics sometimes thing fail.. Suunto were very good about it.
I have 4 years/500+ dives on mine and the battery life hasn't' reduced. I'm happy with rechargeable, some prefer user changeable.
The Perdix can display 2 gasses side by side for Sidemount, the Eon (frustratingly cannot)
I've run them both hard on dive including deco (no more than 15 mins, twice using accelerated deco no more than 50m and Air/Nitrox only - no ccr nor trixmix) Their different algorithms (Perdix Buhlmann, Eon fused RGBM which is not the same as the standard RGBM found on other computers) have no difference. SOmeone will doubtless point out that if you bust through deco stops for more than 3 mins on an Eon, it will lock you out (at the surface) Never happend to me.
Also I've made dives that have all the triggers that SRGBM will peanilase you for (fast ascents, short SI saw tooth profiles etc) and teh Perdix still has similar NDL and deco on the remaining multi day repetitive dives
As Stuart rightly Points out, Shearwaters service in the US is second to none - (outside the US not so much) The Eon in the US can be a silly price - vastly more expensive than the Perdix
As for the Teric, Stuart owns one, and has given reliable reviews, I trust his opinion on it. I personally find it too small. I looked at it but the size was the decider for me - others are different
So which one to choose.
If I were diving with a tech team all using Buhlmann computers, then the Perdix (Although we're big boys here and can cross plan) If I were on big dives +50m and lots and lots of Deco, the Perdix too (I haven't' used the Eon for such dives so I'd be conservative.
Other than that, I find the Eon to be the better computer over all. My Perdix is just a backup, and given the hype from lots on here, I was underwhelmed with it, However it does have the advantage if I ever decide to put transmitters on my Sidemount rig.
In the end it comes down to money between the two, and personal preferences, with either (or the Teric) you'll be happy.
That said none of then do anything that special and a less costly computer would suffice for Recreational diving.
If you don't yet need a fully tech capable computer then hold off until you do. As shearwater have shown they do like to surprise people with a new machine every year or so, and I'd be surprised if something new wasn't around the corner (within a couple of years) with the Eon.
