ls vtec would be the easiest. u can use all honda parts on the bottom end and get nice compression numbers with honda reliability. put some good cams in there with a decent valve train and tune it and you will get 200 easy.

im runnin an ls vtec at the moment with itr pistons (11.0:1 comp), basic bolt ons, and an ok street tune that made 177 whp on STOCK gsr cams. so there is plenty of room to grow.