I'm considering buying either a POD Xt Live or X3 Live.What advantages does the X3 have over the Xt? I'll be using whatever I buy to record guitar and bass with.I already have a UX2 and PODFarm 2.5 and a few model packs.Using the POD X3 Live or Xt Live to process the signal would take some of the strain off my computer.I noticed that the X3 has xlr outs,what would be the advantage of using the xlr outs over the line outs to the UX2 or going straight into my daw via usb?