I can't speak to your situation, as I don't know how much of your budget you are really prepared to spend, but when I looked, I have made the mistake before of buying something for the sake of buying and not waiting for what I REALLY wanted and would REALLY fit the end bill(how I ended up with a new '06 ninja250 for 2 months )...

I'd recommend:
-fuel injection. so much simpler and a reason why almost all new boats are injected and
-vdrive

unless you are a slalom skiier or have a strong need for a dd, or just don't have the extra cash, injected vdrive fits so many more needs. you say now that your primary objective is to pull a tube, heck any bayliner will do that for 1/2 the cash, so there must be some reason why you want into a comp boat, and betting once you get a taste of what they can really do, you might just find a new hobby/pasttime and be glad you didn't settle
either way, good luck and know that you can't go wrong with any skiers product if it's been taken care of.. ask for records.