is it a b20 or b20 vtec? the best is a socketed/chipped p28 with tuning, but if you're trying to go with a drop in and go replacement then the stock b20 ecu is the best. if it's b20 vtec then there isn't a best drop in and go ecu. if you're trying to do that then use the ecu from whichever vtec head you're using (gsr head use p72, b16 head use p30) and then get an adj fpr as a band aid to try and raise lower fuel pressure for the fueling needs.

hope that helps.