As an owner of the much beloved Response 2.5 Quicksilver V4 combo I thought I was done. I would have been happy to eternity with this combination.
Until I saw an ad on CL for a pair of ProAc Studio 3’s with the ATC mid and bass drivers. They were cheap and in rough shape, I had to replace one of the Scan Speak tweeters, but even without checking the crossover caps or any other age related maintenance, They sound absolutely AMAZING.
Although, I will never sell my 2.5s, I must nominate the PROAC STUDIO 3’s as the best PROAC speaker.