Take a look at what hashcows is mining from time to time. it tends to be coins you don't have listed yet.
I don't know about your experience, and I haven't tested cows in over a week, but their profitability has been horrible since the hack (at least for me). We're talking 30% of what I was getting elsewhere. They're share reject rate is also atrocious. Averaging 15+% last time I checked. I'm not so sure they're the ones to model after.
EDIT:
Just to be clear, I am not opposed to new coins though!
