Looking for a keyboard to replace my Logitech K750 solar-powered keybo

I've been using this keyboard for 15 years. when the first one died I got another one used locally. I think it's time to retire it though... want something a little better.

My new keyboard should have the same thin profile and be silent. also should have a small footprint preferrably. a detachable number pad would be great (i prefer it on the left side).

any suggestions are welcome thank you