svx shopping, tranny issues!?

hey guys,

im heading down south over spring break and hopefully ill be picking up a sweet SVX but i wanted to know what to look for in the tranny. someone mentioned that they shouldnt shirt hard and that wthey should be smooth, any other advice?? plus whats the most mileage you guys think a tranny should have on it if i dont wanta have tranny troubles for atleast a few years?? the one guy has 115k on his tranny and he used synthetic tranny fluid, but is that enough or is that too many miles?? also any other things i should look for while shopping?? thanks