Although I have to disagree cryptonight is CPU only, Claymore GPU miner for instance give 474 H/s for an R9 280x (50% efficiency)... although ofc it is not the huge improvement that other algo sees and its only double from a good CPU.
I agree with the cryptonight algo for CPU one

my 2c
Say your opinion!
A hypothetical question that does not necessarily have any ulterior motive; If Anoncoin switched hashing algorithm, what type of hashing algorithm would you liked to see then?
An Atom C2750 can get 53H/s on four out of eight threads on 20W TDP processor. If the CPU's L2 cache could be doubled then it'd probably get ~100H/s at < 30W TDP.