Well I made some more calls today, talked to Lenny at ultimate, Kenny at PTC and to ATI. Honestly I felt like I was wasting the guy at ATI's time, he really wasn't interested in talking to me unless I was ready to buy. Everyone else including Craig at Coan Racing asked questions, answered all of mine and were very pleasant to talk to. Everyone recommended an 8" converter and the same stall speed. The Coan and Ultimate were only $100 apart and Kenny was about $400 cheaper.

I'll rub around on it for a few days then choose one and order.