I liked 3 and 4 the most.
Track 1 still isn't a good choice. The remix in track 2 is alright but I don't think it'll work. Track 3 is cool, real mellow. I really like track 4 the most though. It's got a kind of space age feel. Track 5 was just bad, not only is it the wrong style, but it doesn't loop right either. By the way, to many pop up windows happening. I must have got a dozen or so while writing this.