Great, thanks for the continued comments. I am also super interested in hearing anyone who uses them with either a PF500 or a GK legacy 500 which are two amps I am considering moving onto to (again, limited choices and these are local-although another point we have terrible return policies for most stores in AUS compared to you guys and often retailers won't take them back if you change your mind!). While I said and and still do like the tone with the TH350, I also agree with @Timmah that I find it dark and cloudy at times, lacking a bit of definition. However I also appreciate this could be me, my bass, eq, room etc.