32 cents per kilowatt hour is extremely high, at least HALF of your bitcoins are going to go to power costs with any GPU

im not saying its not worth it, but be prepared to mine for a long time before you cover your hw costs, or maybe get someone with cheaper electricity to host them for you.. for instance power here is 8 cents per kw hour and I don't even pay for it

for GPUS id say get the best you can afford it will save you money in the long run, hd5970's ebay for $350-450 if you look and they're still the best if you can find one that's not abused, 7970 can be had for 350-425 but they aren't as fast as the 5970s

im currently regretting buying cheap 6950s to save on upfront hw costs