^^What he said..
Generally Turbo'd guys go with longer geared transmission so the Turbo has more time to spool and what not.
And sticking with longer gears is better with fuel economy as you're not going to be revving as high in each gear..
Trust me, I KNOW this.. heh
My car had an H23A1 with the stock M2S4 Trans. I think I revved at 3K'ish RPM on the Highway? Great High MPG compared to my new setup... Spun bearing on the H23, swapped in a JDM H22A and a built M2F4 with a 4.7 Final Drive.
Frick, this thing is fun as a heck, but boy does it rev high.. Cruising on the Highway I'm easily hitting 4.5K around 75, 5K about 80, and so on..
I don't drive on the Highway as much I used to, but I drive to Tuscon a lot, or used to, and I would easily average 85MPH on the trip down there. ((I don't drive like this in traffic or around other people. Just when I'm out of traffic.)) And doing that now is like cruising in VTEC. lol