yep, they have a built in drum machine, and a dedicated guitar input and guitar modeling and a touch screen and you can record 8 tracks simultaneously and the mk ii has a usb out to a computer. You can get them second hand for about 600 usd. I had one and they are great. The sound quality is also really good.

If you don't care about usb connectivity (you can sneaker-net tracks to a PC via a CD) the mk i is cheaper (and looks better IMHO).