there are alot of people to work on your tranny it depends on how much downtime you can afford, how much you have to spend etc etc

talk to lancerman if you want a smooth shifting tranny for a great price with minimal downtime depending on his schedule(he is a very busy man)

also try www.teamrip.com
www.shepracing.com

these places cost alot more and not sure of turnaround but i hear tre is quite a few weeks on turnaround