used Integrated tube amp under $1500 for Klipsch Cornwall III's?

thanks, these are great suggestions
this company offers both an set and push pull in my price rangehttps://www.idealinnovations.biz/
Finale audio seems amazing also, their product line though at least at first glance seems super extensive and as such a little confusing and overwhelming
both of the above are within driving distance for me, I'll be reaching out, if they're agreeable might be worth my while to drag my speakers there
are used premium tube integrated amps in vogue at the moment?  when I search historical used listings from 2-3 years ago there seems to have been a ton of em at great prices from the big names, now I'm seeing crazy prices on the good stuff

another question please
can I place the amp on top of one of the speakers without running into any issues?  I would place an isolation pad between the amp and speakers
I'm trying to save space and skip an audio rack
I will have an upright piano between the speakers (never used) and my other option is to sit the amp on the piano, will still use an iso pad

My 1st question would be, what are you not liking about the Forte 111s ?, although, they are not optimum in corners because of the rear facing passives, so that could be it. If corner placement is desirable, get a pair of 2nd hand Lascalas, as they are in another league over both the Forte and Cornwall ( imo, ime ). Modifications galore for Lascala. Stay away from flea watt amps at this time ( 2-3 watts ), as you need damping to control those woofers ( any of them ). Have you heard a tube amp on the Fortes ? Why have a piano in between the speakers ? if ( 1 ), it is never used, and ( 2 ) you are needing space. BTW, I do not recommend corner placement, if you can help it. Enjoy the journey. MrD.

I would place it on the piano.  You run the risk of the tubes picking up the vibrations from the speakers and feeding back when on the speaker (microphony).  Some amps are more susceptible to this than others.  

I have used my Decware mini torii 4 wpc with my Klipsch Quartets and they rock, almost too loud at times.  The decware is very well built. Not flashy finish but not cheap.
I also used a Grommes PHI-26 2/6 watt with the Klipsch and sounded great.