Time for a Pre change? Need the wisdom...

Don't listen to the JC1's unless you're ready to buy a pair, they are a perfect match for the 10T's.

Excellent advise, as I said and explained in my first post captbeaver OP  these speakers of yours need current, the John Curl designed Parasound Halo JC1's in high bias mode will sound majestic. If you can't afford them get the smaller Halo stereo A21+ or JC5 or a used older A21. 

Cheers George

captbeaver

Your AA 10T’s at 86db and with an impedance graph that looks like this, I’m with Stereophiles John Atkinson’s opinion of:
"Its plot of electrical impedance (fig.1), however, reveals that it sucks quite a lot of current from the partnering amplifier to achieve that sensitivity. The magnitude drops to 3 ohms or below in the midbass and mid-treble, and is coupled with a demanding electrical phase angle some of the time.
https://www.stereophile.com/images/archivesart/A10fig1.jpg

I’d say amps of >100watt at 8ohm that can come "close" to doubling that wattage for 4ohm and again 2ohm.
This will keep the bass rich and full and take away from the harshness (mid treble above) you hear probably at 3khz (3ohm) that the present amp/s you have are having trouble driving.

eg: plus/minus 15% or less
8ohm=100w
4ohm=200w
2ohm=400w

This will do current to maintain what JA said " that it sucks quite a lot of current from the amp".

Cheers George