This isn't a crazy race engine, you want a cruiser. Go with the choices you have in your first posts. Could even go a step smaller if you wanted. Neither of those 268 cams are going to be very aggressive at idle.
I have a video that I've posted of a friends Demon with a 360 and an XE268H. Car is very streetable and not annoying. In a car that hooks with a decent converter, mid 12's at 105ish aren't out of the norm.
