I suggest browsing around Magnatune for some great piano music—classical and new agey.
While browsing, I found this and liked it a lot, especially “Piano Circus”. I also like Ehren Starks (that album is ‘Lines Build Walls’; he has another).
If you’re not sure where to start, one of the collections might work, like Great Pianists (Rob Costlow is great, and haunting); New Age Piano is also great. If you really want true classical music, check out the Classical page.
Some other things to keep in mind: Magnatune will let you listen to an entire album over and over if you like, without having to buy anything; they have a daily “free song” (but it’s their choice as to what it will be); they also have podcasts of their music (I like their New Age Piano one). Also, the last time I bought something off their site, they let you choose how much to pay for the album.
HTH!