After my experience with a Mac I decided to buy one of those new Apple TV's with the 160GB hard drives.
Syncing the Apple TV with my iTunes library took about 4 days straight of syncing as my iTunes library is about 100GB (music and podcasts) and transferring all that over a wireless 802.11g connection was very slow (it is a lot quicker to use an Ethernet cable but I did not have one to connect my MacBook to my Apple TV). Although at first it took a long time to copy all my library over to my Apple TV now whenever I rip a new CD or download a new podcast it takes a few minutes for the data to be copied to across, I think this is because there is not as much data as there was the first time around.
My original plan was to rip all my music CDs in an Apple Lossless format and to hook up my Apple TV up to my AV receiver. I found the audio quality of my music albums not too my as good as listening to my CDs from my CD player but the audio quality is still good.
I found the best thing about having an Apple TV was the ability to sync all my Podcasts and watch them on my TV.
So far the Apple TV has been a good purchase but like my other Apple products it gets stupidly hot.