For XMR  :
The amd R9 290X is about 750h/s at stock (gpu@1000, tri-x).
The couple R9 290X @1000 + R9 290@900 (underclocked for noise and heat, -100mv) give me about 1390 h/s.
Power usage is about 330W for the pair.
Maybe when the BBR ccminer will arrive, I will switch to nvidia, up to now amd is good enough.