Hi Norm,
I hear yah .... I'm not knocking your system, you have some fine equipment there, on paper, but it's not paper we listen to.
I'm with Erik Squires and Optimize, the room is an extension of your system, but perhaps you've already addressed that, if not, start there. You may also consider running a designated circuit with appropriate grade wire from your panel (12 AWG) into good quality plugs.
I like the Maggie's - - - but not that much. They seem to be paired with Mac gear a lot (at Hi-Fi shows and retailers). One thing I'll say for Mac gear is it's reliable, the Kalashnikova of audio. Thing is they have a similar sound as well ..... dull. I spent an afternoon at Broadway Sound in Vancouver listening to a pair of big Mac monos (model slips my mind) and a pair of 3.7 Maggie's. The Mac's were running just about flat out, and I thought - - - where's the beef. Like I said, I find Mac amps dull and uninvolving - - - but that just MHO.
You're in a bit of a pickle there Norm, if you're going to move up the audio latter as opposed to a lateral move you're looking at some pretty esoteric gear, which is not only pricey, but rare. Roberjerman suggested Quad 2905's, nice speaker, but Quads are like Italian cars.
I wish I could be more suttle, but I can't (for your sake), can the Mac gear! Go used.
Speakers: Martin Logan Quests/or Requests, $1500.00 and if you have a big room the Prodigies.
Amp: Krell KSA 300S $3000-$4000, or Threshold SA12e, or Sim Moon W10's $3000 - $4000.
Pre-Amp: C.A.T, or an Atma-Sphere MP-1 or MP-3, or Audion Premier 2 box Silver Night. On a budget, a giant killer VTL Ultimate $2000.00.One last thing - you may solve your issues with a phono cartridge, there I would suggest a Soundsmith Aida MKII.
Good luck & happy listening.