Long story short, I have no space for an amp nor can I practice with any sort of decent volume for the foreseeable (until we move house and get a garage/decent shed). So I'm after a simple and cheap-ish way to practice with headphones, ideally via an iPad. What I'd like to be able to do is have a metronome, drum backing tracks, maybe some playalong stuff on the screen, all running through some headphones so I don't disturb the kids/neighbours. An effects emulator might be cool, but far from esse