I was on a hunt for a good guitar amp that had plenty of modelling features so I could have a great variety of amp tones and stomp box effects when playing live. I came across this Fender Mustang 1 (20 watt amp) which looked like it would fit the bill. Best of all it has USB audio out as well as headphone/line out. If using the USB out, you can hook up to your iPad via the Camera Connection Kit. It works awesome btw.
Just wanted to pass on this tip for any guitar players looking for an amp.