Need Input from you guys

Ok...heres the deal...i have an 89 CRX si that is motorless...the plans i have for it are to go for the sleeper look...as far as performance...i am looking at all motor now...with the possibility of F/I down the road...what motor would be a good option for what my intentions are.... I kinda am stuck between a B16a2---B20vtec(b16a head)....or a b16a1.....any suggestions?????


PS..I am already set on an Ls tranny with a GSR fifth and final drive gear...so that aspect of it is taken care of....