The RC-20 Loop Station is pretty small in size compared to the Boomerang +, and costs $100-$150 less; They are both good, and if you're on a budget, get the RC-20. I'm not on a budget ($3500 in the bank, make $500 a month, living for free, so that means $500 i can spend on whatever i want) I've played on both, and I happen to prefer the Boomerang.
~Incidents