If you're staying in the hobby..buy the GTB. You can buy them used or re-man for around $100 and they're a lot tougher than the XBR. The XBR works fine as long as you don't do anything dumb with it, like say...hypothetically reverse polarity on a 4800
, while the GTB just shrugs it off and keeps going. It's just a much beefier unit.