You'd get much more profit mining some type of altcoin, for example, Ethereum or Monero. The RX470 is pretty much the best GPU you can get for the price and has the best efficiency and mh/s ratio for any miner. I'd recommend you'd keep those GPUs and keep mining.
i m mining BTC with GPU's
i already bought 12 RX 470 8GB
but i have some info's that i can find cheaper and better Gpu's with much MHS/s
now i want to spend 10K on gpu's
and if any one can give me a good tip what kind of GPU's should i bye it will b great.
""LONG LIFE BTCBTC""
You would be mining a altcoin with GPU's. Keep in mind if budget is 10k you can't spend all on cards assuming you buying all gear, and no gear sitting around. Good PSU's, motherboard, CPU, Memory, HD, etc are going to take some of that budget. But you really need to check out altcoin forum, and also if you are going to flash card's etc.
And don't forget about heat and electricity needed. Do you have electrical set-up? As if not setup with electrical, cooling, shelves, etc can add up on startup.
You can boot off of a live Linux USB if needed, and RAM is cheap if you buy it used if you want to skimp on your rig and get a cheaper build. PSU and Mobo is what you'll be looking for. CPU doesn't really matter that much for the most part; a 3$ C2D will work most of the time.