if you dont have a car, an ex is a good starter motor. it has a billion interchangable parts like trannies, head, pistons, etc, just cause it's a honda. performance parts are also a lot cheaper for a single cam motor for some reason too. also, it's a bit lighter than a b16, so if you're looking to autocross or something, a d16 is a good choice. im trying to set my car up for autocrossing and road racing right now, and it's an ex coupe.