Ward, even though you have scaled down the scope of your system, it's good to hear you're listening to, and enjoying listening more to your music and system.
I recently had a Chinese Audio Renaissance 845 amp re-capped and otherwise gone through, and I've been very pleasantly pleased with how it makes my Tannoy HPD's sound. Even though it's a very inexpensive amp, it's very quiet, and myself and my Tannoys really enjoy it.
Your Antique Sound Labs AQ-1006 mono-blocs, I would think, are a great match for your custom built horns, still beautiful after all these years.
Best regards,
Dan