Hi all, new to this excellent forum. I've been running a Sugden a21a - looks like a 90s model - for about 6 months now, it replaced an Audio Innovations s500 (fettled) with pleasing results, I've yet to switch back to the S500, and I'm sure that will be interesting, it's a great amp, but I felt it wasn't able to deal with more demanding genres like rock and classical, hence the Sugden. My speakers are Audio Note Js,I'm well aware of their design difference from many other speakers, and like the valve amp, that they can struggle with more complex music. So I thought I'd try a more neutral speaker, and have been told Proac might be a good option. I see a few cheapish models on the 2nd hand market, and would appreciate any help with their sonic character, The studio 140 and the rather older super towers. Thanks in advance.