I have a Bag End S15D and S12D that I am quite happy with. They are portable and give me a nice tight, generally smooth sound (with a little tweaking) when paired with PF500 and an old P bass with flats and a Rob Allen Mouse. (I always play both in my current band). We play a mix of jazz and pop material and obviously are not terribly loud. I am wondering if moving to either an Aguilar TH500 or Genz Benz Streamliner or Shuttle 6.2 would be a reasonable upgrade to my sound and which are a good match for the Bag Ends. I am not looking for grind, grit or 'wooliness'. I am looking for the best clean 'modern tube' tone I can get. Thanks in advance for your input.