Stock bottom end I assume? You can make 350-400whp pretty reliably with a good tune and supporting mods.
I'd do a GTX2867 or GTX2863 with a .86 housing, this is going to help keep low end in check, if you throw too much boost at a stock bottom down low you are bound to send a rod out the side. These turbos move a lot more air and mover it really efficiently, this is great for a built engine, but can quickly kill a stock bottom end.
Check out what ATP offers, they've got a bunch of options for the SR that use the standard style compressor housing, simplifying the install. They've also got oil feed and coolant lines to match.
ATP SR20DET Turbo Upgrades
Quick list of what you'll need to bolt it on and rip:
-Turbo
-New gaskets all around
-Oil feed line
-Coolant lines
-T28 oil drain fitting
-T28 oil drain hose
-T28 compressor inlet/outlet adapters
-Larger injectors (740-1000CC)
-Larger MAF (Z32 is the go-to)
-Larger intake tube suited to the MAF
-Filter adapter for MAF
-Tune-able ECU (Up to personal preference on which one)