bayustev :
if you got strict budget, better use r7 370
I'm just not convinced that a 370 is really that substantial an upgrade from OP's current 570. It's faster, for sure, but maybe 10-40% ish depending on the game and settings. On a tight budget that's not a huge performance boost.
For comparison, here's a 370 vs a 580 (they don't have a 570 - but it's 10-15% slower):
http://www.anandtech.com/bench/product/1590?vs=1444
So upgrade, yes... but substantial upgrade for someone on a tight budget... I'd say no.
Save up, see where things land with the 1050/1060 3GB/470/460... you're likely to get better options.