id stick with the b18c1.....b20/vtec is alright cuz you'll take a b18c civic in low end, but top end BLOWS. if you are more the autoX type and flying around turns not doing much straightaway stuff....id suggest the crvtec swap, BUT........since you already have the B18C i suggest sticking with that.
just throw some mods onto the b18c and vroom vroom off you go
