Do yourself a favor stay away from anything M-Audio they are worse then creative for driver support and avid owns some of the interfaces and another company now owns the other ones that avid didn't want to keep. Avid makes m-audio and creative look like saints when it comes to driver releases and fixes. The focusrite sapphire's are good, though i found the 2i2's input and pres to exhibit strange behavior. I currently have an akai eie pro which works well although it can have some crackle and pop issues until you get it sorted out.
Windows 8 pro I7 2600K 4.5Ghz Asus z77 sabertooth 16 gb ram crucial C300 SSD 256gb