There are few scripts that I know of (not free ones) that monitor difficulty on proven-to-be-profitable coins and give you recommendations based on your average hashrate. Some of them constantly have new coins added, those with good potential.
Yepyepyep. That's what I am looking for. Do you know any of those?
You can look up Mikanoshi in this forum, he is a developer for one of them. Not cheap though.