I agree that matching a REF3 with an Onkyo amplifier is a bit of a mis-match... but who cares. This is a hobby and if you want to give it a try, go for it.
I think it makes more sense to buy a component that you really want (like a REF3) and plan to keep, than buy two components which you know you will flip down the road and possibly lose money on.
I think it makes more sense to buy a component that you really want (like a REF3) and plan to keep, than buy two components which you know you will flip down the road and possibly lose money on.