If you like the Logitech K380 but want something that's a couple of steps up from it, then the K811 is probably your best bet.
The K811 is slightly better looking and comes with LED backlighting, as well as an internal rechargeable battery so that you don't have to deal with changing out batteries yourself.
It's also made out of aluminum instead of plastic, so the build quality is certainly a step up. However, it costs $80, so it's certainly not a cheap keyboard by any means, but it's a great option.
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