all of these are good points. your friend with the civic b16 must be one hell of a driver. the engine is VIRTUALLY the same. i say virtually because layman terms its basically a b16 bored out. the b16 is more accesable, as for parts the bseries is blessed with the abilities to swap parts between engines with minimal alteration. IF however you can find a 92-93 GSR complete with a b17a engine it would be quite a find and a collectable. they made a limited number of the 92 gsr because it was introduced halfway into the production year. so these guys are right. the b16 would be easier to find, less miles, and a newer engine. the b17 i would go for ONLY if you find a complete car simply because of the rarity. if you just want an engine, get yourself a b16a. have fun.