transmission advice

if i wanted to buy a transmission a little bit better than the stock one, what should i buy and how much would this cost. i want a better one than stock, but im not really educated on this stuff yet. also where is a good place to buy one, if someone could help me that would be great- thanx.

hey check this place out, someone else on this forum showed me this place, its in california.

http://www.gear-speed.com/