do some research... buy a speak & maths and circuit bend it!
It has some of the best glitch sounds (in most opinions) of the 'speak &' series and has awesome looping features when bent too!
Can all be done for under £30 and soldering can even be done by a gimp like me so you will be fine!!
Seriously, best thing you will ever do!
how to guides are all over the net or you can be lazy and buy a pre-bent (expensive) one of ebay too!