I know The 7950 is the most efficient in (MH/s)/$/watt... but I have contractual access to unlimited free power. I'm already using the power anyway so the marginal cost of the power is actually zero. Is there a machine I could build and turn a profit with at this point? Litecoin is not the most profitable Scrypt coin to mine now, so don't assume I'm mining Litecoin. The asics coming out "soon" might be a concern, if they actually even come out soon, but its my understanding that they are good for being low wattage, whereas the hash/dollar is similar to GPUs still. Assuming I could be confident that a Scrypt asic manufacturer is trustworthy enough to buy from, I wouldn't be opposed to doing that, but thats really a pretty big gamble, unlike ordering a bunch of parts from amazon/newegg on cyber monday. Also I'll be able to resell GPUs, so even if this becomes non-viable after 6 months or so, I'll be able to recover a decent chunk of my investment. I say "unlimited budget" meaning I can fully saturate a motherboard with GPUs or purchase an asic without an issue, whatever the most efficient is.