Picking up where its predecessor, the 720, left off, the Electro-Harmonix 1440 Stereo Looper is a rather affordable Midi enhanced looper that offers 1440 seconds of high-quality, uncompressed, stereo recording time (twice as much as the 720) plus the ability to store 20 different loops.
Hosted in a case slightly bigger than the compact format, offers some unique touches like unlimited overrdubbing and Reverse and Octave speed effects for extra creative options, but also the more standard Undo-Redo, 1 Shot playback, and Adjustable loop fadeout.
On top of that, the free app 1440 Loop Manager (currently available for Mac with a PC version in the works) allows you to backup, restore and also export in .wav file any loops.