Take a look at the SJX boats www.sj-x.com
and if you like what you see and are on a budget, then go to SeaArk's webpage and order the same boat for a lot less. I think SJX adds some graphics and maybe a little extra fabrication, like custom consoles, etc.
Make sure you don't get a boat with a prop tunnel, as that won't work for a jet. G3 and Lowe both have decent budget tunnel jet setups. The SeaArk will be a lot tougher and probably last you a lifetime.
The river I run is mostly shallow sandbars and stumps, so a tunnel prop works great for me. Anything shallow enough to show a ripple in the water, I can go around - if it's too deep to make a ripple, the boat goes right over it. YMMV if your river doesn't have much current.