Do you have an EFIS? If yes, does it support "IN"? Your "In" may be best displayed there, if possible.
Most any compatible ADSB in device with both 1090mhz and 978mhz reception for $200 to $1000 will work.
Having had a Dual 170 GPS with only 978 input and no ADSB out, it was only "good"for weather.
The KT-76C is now disposable. Mine died that came with my plane, vacuum cavity with a pretty digital face. A replacement still needs a check if you install another one. $200 for the "new" one, likely a KT-76A and $200 ish for the check.
No EFIS, the new adsb out transponders look better if they display the "IN" traffic and weather as well as wifi/bluetooth to any other portable display device.
My current "in" is an ebay $160 used Skyradar DX 1090/978- it feeds my GRT EFIS via USB hub and portable devices via wifi.
My "out" will likely be a Skybeacon, my transponder is also a KT76A, same tray as your C, was $400 a few years ago, cheaper now. If it died today, I would go post your same topic with the price gap closure options so changed, myself.
The big technical decision is do you want to be seen directly on other planes' 1090mhz aircraft to aircraft streams? A UAT ADSB-out on 978 mhz like the Skybeacon must hit an ADSB ground station antenna to be processed and retransmitted, then you can be seen by other aircraft's ADSB in on either 978 or 1090mhz devices, as I understand it.
Any consideration for rudder flutter from the tailbeacon addition on the small rudders? 70 grams/2.5 ounces.
The skybeacon calls out 6/32 screws, my Grimes are currently on 8/32 nutplates. The tailbeacon calls out #4 flathead screws, mine are I think #6s, so I'm doubting a 10 minute install either way.