Cryptonote is NOT the best algo to CPU mine, since there is also gpu miners.

Like monsato, I also find VRM (Verium) to be the most profitable CPU coin to mine, probably the most CPU specific algo as it is very memory intensive, so you can't get anything from a GPU.

On my old single xeon desktop, i get around 0.5 VRM daily (1 to 1.5 usd depending on the market price, but i am obviously holding this :p)