I want to know the best GPU I can buy right now to profit in script mining.
Does not exist nor has it existed for over 2 years.
ASIC on Scrypt have pushed so far past GPUs that there is no such thing as a GPU that can profitably mine Scrypt - even with FREE electric, you'll probably have the card die before it manages to mine enough to pay for itself.
For that matter, the Gridseed GC3355-based ASIC gear is to the point it's not profitable unless your electric is VERY VERY cheap - despite being a lot more efficient than any GPU ever was at mining Scrypt-based coins.
If you look into non-Scrypt non-SHA256 coins, THOSE can still be mined for a profit in some cases by some GPUs.
DASH would be a good choice for Maxwell-based NVidia cards given recent X11 optimisations for them, not so good of late on anything AMD though probably profitable enough on free or VERY VERY cheap electric.
