Rob - I've got an '89 Supra Comp, and it's a good boat. I run 450lb sacs on each side of the motor box. With the wake plate up, 900lbs, and a couple of people, it puts out a pretty good wake for learning on. I paid $7000 for mine, but it needed a little tlc. It's no SAN, but it's also not $60k.
If you're looking to add a couple 1000 pounds of ballast, then you may want to look into an 80's Nautique. The Comp sits pretty low and won't hold that much weight. But for $7500, and it already has a tower, I say go for it.