I am looking for a backup amp as well as something to use at smaller venues. I have a GB Streamliner 900 so I have plenty of headroom when needed. I have (2) MB NY 604's. At smaller clubs I use only 1 cab. I have narrowed my search to the TH. I also would like to have a solid state amp. My question is will the TH350 fill that void or am I better off with the TH500. Other considerations would be the LMIII or maybe the soon to be here Big Bang. Trying to get some opinions. Thanks.