I have this exact same dilemma. I have upgraded my electronics, and then wondered if the KEF 104.2s were worth upgrading. Luckily my friend had a pair of new B&W CMD7 NT. These are the same price as the 104's were back in the early '90s, so with inflation the B&W are actually cheaper today. The reason for using these speakers is that I thought they were in the "same league" as the 104.2 in their day. Anyway, we brought the speakers over, spent about an hour dialing in their location in my room with my electronics, and the results surprised me. The stage, the depth, the accuracy, and overall reality of the presentation was far better in the B&Ws. As a long time fan of these speakers, I didnt want to believe it, but it was true. The technology has gotten better, no doubt. The high quality electronics that you own, you are not even hearing yet, trust me. Take you 104s and may use them as a start to a surround sound system, and get a new pair of speakers, so you can finally hear your system.