Interesting topic. I never flew the T-37, only the T-34C and the T-2C Buckeye. I just finished up a tour flying the T-34C as an associate IP with VT-6. I will say that IMO, a replacement is long overdue for the 34. The T-6 is obviously more in line being a turbo-prop with much higher performance over the T-34C. Not sure if I'll miss the 34 much when it goes....a very slow, noisy and uncomfortable aircraft. However, very manueverable and very easy to fly. The T-6 adresses in my mind, a few critical things it didn't have, ejection seats, power power, ability for the IP to see better around the stud and canopy's able to withstand bird strikes up to what, 4lbs?? at a certain speed. I see both sides of the house with the Tweet vs Texan.
A buddy of mine few T-6A's at Pensacola and compared it to the T-2C Buckeye in performance, better in some ways, worse in others. I'll be flying T-6A's with VT-10 as an associate pilot when I return from Iraq next year

I don't remember much from the T-2C but I assume the T-6 is a joy to fly from all I hear. From the few folks I know who flew the T-37 (Navy guys who went to Vance), they loved it. My mother's old boss was an A-37 Dragonfly pilot in Vietnam and that plane was the love of his life as he put it.