currently have amd fx 6300 + r9 280 with Corsair cx600w psu. Just got into mining and I could get a r9 280x for 80 euro, but would my psu be ok for this as ETH mining doesn't stress the cpu. When gaming I would probably only use 1 gpu.
buddy, you wont find much support for currency mining here. specifiacally its a lose-lose endeavor. and to add the word 'budget' to the equation says to me you dont know what your doing.