As said many times, go with the 4k. I sure do miss mine..

 

I've got a yank 4400 and love it.

 

i had a 3200 acc in mine and hated it. It was a pos flashed to arounf 5k all my little truck does is rev up under normal driving unless you stomp it then it just wants to toast the tires. Going to put the stock converter back in this weekend and see how it reacts then after the first of the year I am going to try a 2800- 3000 from fti. As long as the veh is tuned right is should idle fine with any converter just not get all the full performance out of it without a stall. I don't live at the track so I will give up some performance to make it more street freindly. Mine is a 02 s10 ls6 with a 225/229 .580-.590 cam