Was thinking of smaller playback rig for myself lately. I'm currently running the standard Laptop-Mixer setup, but it's a bit bulky because of all the other stuff we have to carry to gigs. So I'm thinking about buying even smaller mixer (as in the picture included) and use a phone or an iPad mini to launch the backing tracks. And a 2-channel DI box for playback and my guitar, which is powered by BIAS FX on an iPad. Gonna be a much more light and smaller that the current one.