I dive the Tusa IQ700 as well. It is simple to use, conservative enough but not overly so, and nitrox programmable for 2 gasses on the same dive. It's also PC downloadable if that's something that you are looking for as well.
Hey overNunder, I know it may be out of the way for you, and I never heard of the other shops you mentioned, but you should make the trip to visit the guys at MBT. Spearfisher (Rich)is one of the instructors there, and Evensplit (Jim) is one of the owners, and Holy Spear It (Kevin)runs dive charters out of there,and they are all a hell of a bunch of good guys. It's a lil bit of a trip for me too, but I make a point to buy all my stuff there.
You won't be disapointed. They have put a lot into the diving here, have been on the Discovery Channel a couple times, ect.
right on brother. i've heard alot of good from there. p'cola ain't too far, i got certified in o.b. usually git my shiznit from internet, gary's, down under but if mbt is the way everyone describes a 40 minute ride won't hurt. preciate it guys.