I like my stick, and won't drive anything else. Yeah, I know all about the auto's being more consistant and all that shizzle, but in my mind real cars have 3 pedals. I had 2 different people ask me what C-4 I was running, and actually had to show them inside the car cuz they wouldn't believe me that it was a 5 speed.
Call Walt at Pro Motion in Florida, the man knows what he's doing about stick shift cars. G-Force makes a killer tranny, and like you mentioned Tremec.
If you're gonna put an automatic in it, might as well throw in an air shifter too, and take ALL the fun out of it.
Just my $.02 and I don't mean to make anyone mad at me, so please don't take it that way!!!!
"Beat 'em with a stick!"