well, you could get the podxt live, and run that through either the amp or the PA. preferably the PA, because crate amps aren't the greatest. or you could buy your tube amp, and have that. either way, whichever you think sounds better. personally I came upon the same descision a while back and decided on a peavey XXX combo amp. all tube and only cost me $500 on sale. ultimately the choice is yours, but either will work fine (the podxt route will probably be cheaper though)