Just been pointed in the direction of a cracking website where there a massive range of quality mixes in all house types you can think of, as well as numerous other genres to.... free to listen/download at your hearts content

http://www.house-mixes.com/

Takes 30 seconds to register and then just browse and whack up the volume

I'm a big fan of Chocky'o'Brians mix's and have a good few (the mix that never was is quality) but if you want an injection of new stuff check it out.

Even has an R&B section if your into that sort of thing