There ought to be a big link to this site somewhere here
http://www.vgmix.com/
In the past I've downloaded a couple of songs there that were awesome. Then it went down for a long time. Since its been up I've not really looked at it, but there's really a lot of high quality stuff there and lots of detailed reviews, e.g. I found this Bionic Commando remix on Gecko Yamori's top list
http://www.vgmix.com/song_view.php?song_id=289