Out of curiosity, what does Blue XTSea lack that Aldora offers, besides steel tanks? (Blue XT Sea offers larger aluminum tanks as an option.) Not that SB posters don't have their biases, but Aldora and Blue XTSea are, from my estimates, the most frequently recommended dive ops on SB (though others are close behind--I made a list ranking the top five or six by frequency of recommendation). I went through the same exercise as the OP last year ... except that I used the Search function first :cool2:
Comparing to Living Underwater, which I believe offers the same "perks" as Aldora:
1) Smaller "big" tanks. The aluminum 100s are obviously of less capacity than steel 120s and they lack the good buoyancy characteristics of steel tanks.
2) Big tanks are more an option than the rule = shorter dive time. When I dove with Blue XTSea, I was the only one who used a 100. All the 80 divers had excellent air consumption, but our diver were still routinely shorter than when I dive LU where most are on 120s.
3) And this is the real deal breaker for me: no wetsuit storage. LU handles all my gear, including my stinky wetsuit (not that I ever pee in it, of course!). I already have to lug my 40 lbs of camera back and forth, so having to carry a dripping wetsuit back to my room is too much, especially if I'm staying at a swanky place like the Palace and dripping water all over their fancy marble floors.
That said, I completely enjoyed my dives with Blue XTSea. I just like an even bigger tank and wetsuit storage.
As to Mike's point about the smaller ops sometimes not being able to offer all dive sites because of lesser experienced divers aboard, that unfortunately can be true. Still, even when LU has brand new divers, I always feel that my needs are also taken care of - Jeremy will find me interesting critters to photograph that I'd never find on my own. I wish he had a policy of experienced divers only, but that probably wouldn't keep the boat full on a daily basis. On the other hand, my experiences with Aldora (albeit, over 10 years old) were a different story from Mike's - the hype said we would be on the "advanced" boat, but they were only running two boats and we got stuck with airhogs that blew through 120s in well under an hour, limiting my dives as well since the policy was for the entire group to ascend together. (In Aldora's defense, they have more boats now, so probably a greater likelihood of accurately matching dive group to skill level.)