Kinesis Advantage - mechanical key split keyboard, 2 USB ports in the back. They're updating it, so if you're in no hurry, they'll be releasing an improved version at some point (AFAICT, months, not years, from now). https://www.kinesis-ergo.com/shop/advantage-for-pc-mac/
I too have a Kinesis Advantage and have had one for years: http://jakeseliger.com/2011/07/17/further-thoughts-on-the-ki.... So far it appears remarkably durable, and I much prefer it over conventional keyboards (though I still use laptop keyboards when I'm traveling).