Dont miss out on the newcomer Groestl used in Groestlcoin. In a test that was done comparing most of the known algos Groestl was the most energy efficient and especially friendly for CPU/GPU mining. It's the future. Check out the comparison here:

https://bitcointalk.org/index.php?topic=525926.msg6073250#msg6073250

Reddit: http://www.reddit.com/r/groestlcoin

BTC-talk: https://bitcointalk.org/index.php?topic=525926.0