I love my HP 119's, because of how they trim out, and the extra gas cushion. I'm almost always coming back with 1,000 to 1,500 psi after an hour dive, and if I go deeper or work harder the extra gas is wonderful.
That said, I also own a couple HP 100's and they are a great tank as well!
When I go North or to the coast where I might be doing some dives where I want to maximize my time between 100 and 130 fsw I bum my buddies 130's - a delightful tank! That and a slung 40 if desired and I have all the gas I need for pretty much any recreational dive in the sound.
Beyond that there are double's, side mount, and ....the ...dark side. But i hear they have cookies!!