GPU miners will be worthless at best and lose money at worst because their hashrate and their efficiency is so much lower than the Antminer that there's no point having them.
You should take this to the altcoin mining section. Maybe they can help you, since there are a lot of altcoins which you can mine profitably with GPUs (some very profitably).
i think you forget a big big detail!
if you use a GPU RIG to mine alt coins, you can sell your GPU in the future... if you have not burned it yet.. of course :-)
But if you mine with asic, like S9 or avalon 721/741, you can use it, just for paperweight