I've always been fond of the Wilderness systems kayaks. The differences between a SOT and a SIT comes down to weight, the Sot is heavier, and fishing friendly. When it comes to fishing the SOT clearly has the advantage. You can swing your legs out of the SOT and have access to tackle or a cooler behind you without leaving deep water. Many say that its easier to get out of a SOT, but in my experience that's minimal at best.
Don't forget that the longer the yak, the better it tracks and it will be faster.
I've used a Tarpon for several years now, I have 2 others, and its my favorite of the yaks. A 9-10' SIT at around 40# is a clear winner on small waters, but not beyond that.
My overall choice however is my 13' solo canoe, it can out maneuver the Yaks while carrying a bigger load. It doesn't track as well, but that's the price of more maneuverability.