Looking for Advice on Focal Speakers

@suboost, a used Parasound Halo P5 (I think it is discontinued) or a Halo P6 should work well with the A23.  There's other preamps that should work with A23 - so you are not limited to using the same manufacturer.  But you would also need interconnects.  Both of these preamps have HT bypass.  See Parasound links below:

https://www.parasound.com/p5.php
https://parasound.com/p6.php

You might let the vendor know you're interested in the Focal 936s but also let them know you are using the same space for both home theater and 2-channel listening.  What options might you have with your current equipment where you could switch between the two.  Hence the suggestion for the HT bypass option on an integrated amp OR buy a preamp with HT bypass and the interconnects.

Hope that helps.

I have the Kanta No. 2s. I listened to the 936.s before I bought the Kantas and can state they certainly are a step up from the 936s. I also agree with other posters that 1) they don’t require a lot of "toe-in" and 2) if you have patience you can pick them up for 1/2 price. I bought mine last year for $5K used, 1 year old. As far as the brightness of the Be tweeter goes I find it is more due to the recording and other gear you pair with the Kantas than the speaker itself, The last thing I will mention is, and this is likely the most important part, make sure your amp is comfortable with 2-3 ohm loads as both the 936 and the Kanta both hit less than 3 ohms in the 100Hz range and stay below 4 ohms up to around 500Hz. Mine are hooked to the 4ohm taps on a pair of Rogue M-180 monoblocks. The video below is an example of how they will sound on the lower registers. And I don’t find a lot of "brightness" in this recording. Obviously the room set up was not great when I recorded this but it has changed a lot since and sounds even better now. I would use this recording to audition any speaker when wanting to test its ability to reproduce lower frequencies. Another is Temple Caves from Micky Hart’s Planet Drum album. You should feel the floor rumble with either of these. If not then your amp is not up to the task.

Birds by Dominique Fils Aimé - YouTube

@cd84 nailed it in the first response.  @suboost you can buy just a pre but what i've seen is for basically the same money you can acquire a high quality integrated instead.  Parasound, Anthem, NAD or even Marantz the possibilities are endless.  

If you are a car guy at all you know you can't just drop a giant turbo into a car without changing the fuel system, tune, exhaust etc.  What many of us are suggesting is the Kanta by itself would be the equivalent behavior.  Good luck, it's fun and you have me rethinking doing some listening sessions at my dealers in area this fall.  

I owned the Aria 936's for about 9 months and never warned up to them. I always felt the tweeter was disconnected from the rest of the drivers and they didn't disperse evenly and together. I moved up to the Electra 1028 and absolutely loved them. I considered the Kanta but got a better deal on the Electras. I would go back to the Electras in a heartbeat much better speaker. The prices for the 936 are getting out of hand. I got a deal on the 936 brand new for under $3k just two years ago. You might find better value elsewhere. 

I bought a pair of used Aria 936’s and run them with a PrimaLuna HP integrated and am consistently thrilled with their SQ. The PL has no issue with impedance load in Ultralinear (70w) or triode (40w as I recall).

If they are within your budget I think you will be quite happy for many years as you continue to upgrade your system. Unless the additional cost of the Kantas are of no consequence, I think the Aria’s will be hard to beat. Financial strain is no fun these days. Choose wisely.