I've been a happy owner Of The BossRC20 XL Loop Station for over a year now. There's a single input, a double input, and the big daddy, a five input. They're $180, $250,and $500 respectively. I absolutely love mine. I am adamantly against performing with pre-recorded music so my Boss RC 20 is perfect for my needs. I thinks it's perhaps the coolest musical gadget ever !!! It took me a little time to master the looping technique but I got it now and people really dig it. The audience gets to see a tune created right before their eyes and I feel as though respect and appreciation is greatly enhanced with "the loop".I run my guitar into one input and a stage mic into the other. I'll add percussion such as djembe, casaba, cabasa, cowbell, shakers, thunder tube, goats toes, sleigh bells, tambourine, vocal percussion, etc... on top of a guitar loop. Then I'll sometimes add vocal harmonies on top of the previously mentioned. The important thing is variety and dynamic diversity. One can overuse "the loop" sometimes if one's not careful. I do not work for Boss so I'm not trying to sell their product. I'm just a small time( but Full-time) working musician and I strongly endorse the Boss RC 20 XL.
Give everything but up.