I just recently purchased the H4n and it is awesome. It's very versatile. Not only does it have the two onboard mics which sound great, it has two XLR inputs with phantom power. It can be used battery powered, ac powered, or usb bus powered. It can also be used as a usb mic/interface. The features and the bang for the buck for this thing are endless.
I got it so I could get recordings (voice overs and field recording), while not being tethered to my computer. I'm enjoying the freedom =)