B16 first choice. Make more power with less boost. Better flowing head, better rod stroke ratio,etc... LS/Vtec is a good choice if done the RIGHT way. Which in turn would probally cost more money than the b16. I would say a b16 with a b18c1(gsr) bottom end. With the b16 head on that block itwould yield the C/R to about 9:8:1 or 9:5:1 something like that. You get a bigger displacement, much better rod to stroke ratio and a better flowing head.