General question: I have an i5 2550k, and an i7 3770. Both are profitable per calculators mining most of the gpu minable coins. I usually let them just run cpuminer, and mine on an LTC pool all the time, racking up a little here and there.
Being Yacoin is optomized for CPU mining and NO GPU mining, would I be better off mining a GPU coin with these CPUs... or is Yacoin more profitable all things being equal for these CPUs? There just aren't any calculators that would answer this one way or another.
Technically, there is a calculator: 
http://www.whattomine.com/coins/42-yac-chacha-nf17 although it is a little complicated because of the minimum difficulty level that YACoin is currently subject to..
Soon YACoin will be THE most miner-friendly coin out there. Yes, it seems that high memory requirements are the best way to keep GPUs and even ASICS from gaining an advantage.