I've driven a 8.3l 330hp with the 1050lb ft. Its not bad but personally prefer the 8.9l with 400-450 hp and 1200ft lb. Definitely better than a 7.2l cat or smaller cummins like the 5.9 or 6.7...The 330 HP would be a deal breaker for me if I was going to tow anything. Personally I wouldn't do anything under 380 HP.
The issue is RD has to have the bunk house. So something will likely be a bit of a compromise