The short answer: Garret GT30R.

The long answer: here's a few tools on how to pick a good turbo for any engine.

http://www.turbofast.com.au/javacalc.html

The best resource there is the "TurboPower" calculator. You enter in the bore, stroke, number of cylinders, rpm, boost, level, etc and it calculates an estimated air flow level. From there you can use the data to read a compressor map. This is what a compressor map looks like:



Air flow in lbs/min is spit out by the calculator. Your pressure ratio is just boost level. Take whatever your boost level is and add 14, then divide by 14. So 6 psi plus 14 is 20, then divide that by 14 and you get a pressure ratio of about 1.43. Then you find what compressor efficiency level that puts you at for that map and figure out if it's a good match. So for this particular turbo, if you were flowing about 25 lbs/min at a pressure ratio of 1.7 that would put you right smack dab in the middle of the compressor map.

Most turbo manufacturers have compressor maps on their websites.