I went with the WC T-5 since it was really cheap compared to the t56. (spent $250 for mine with new clutch and flywheel off of cl, compared to a T56 on CL for $1200 without the extras). I'm pushing close to 310hp/340tq and have had no issues with it all.
For the T5 you have to trim the shifter hole a tad on the drivers side, but not much.