Yeah the LS50 is a great choice with the Dayton amp, or their center speaker from their R-series is on sale for the same price...
https://www.kefdirect.com/home-theater/home-theater-separates/center-channel-speakers/r200c-center-c...
One of those is the way I’d go, but if you’d prefer self-powered here’s one a little above your price others here have reviewed positively, and with its professional roots you should get plenty of clarity...
https://www.amazon.com/Adam-Audio-A77X-Powered-Monitor/dp/B006TDQPKQ
On the lower end of the price spectrum and if it can work in your setup, my brother uses this as his self-powered, wireless center channel and it works surprisingly well. You just need to use it with their $29 stands or put blutack (or something) under it as I find it doesn’t sound its best sitting directly on a hard surface. At $179 for a refurbished unit (I bought my brother's refurbished and it was perfect) I’d think this might be worth a shot especially if this is only an interim solution, and you have 30 days to audition so you can return if it doesn't work out (although you’d have to cover return shipping).
https://audioengineusa.com/shop/factory-refurbished/b2-wireless-speaker-refurbished/
Hope this gives you a few more viable options, and best of luck in whatever you choose.
https://www.kefdirect.com/home-theater/home-theater-separates/center-channel-speakers/r200c-center-c...
One of those is the way I’d go, but if you’d prefer self-powered here’s one a little above your price others here have reviewed positively, and with its professional roots you should get plenty of clarity...
https://www.amazon.com/Adam-Audio-A77X-Powered-Monitor/dp/B006TDQPKQ
On the lower end of the price spectrum and if it can work in your setup, my brother uses this as his self-powered, wireless center channel and it works surprisingly well. You just need to use it with their $29 stands or put blutack (or something) under it as I find it doesn’t sound its best sitting directly on a hard surface. At $179 for a refurbished unit (I bought my brother's refurbished and it was perfect) I’d think this might be worth a shot especially if this is only an interim solution, and you have 30 days to audition so you can return if it doesn't work out (although you’d have to cover return shipping).
https://audioengineusa.com/shop/factory-refurbished/b2-wireless-speaker-refurbished/
Hope this gives you a few more viable options, and best of luck in whatever you choose.