I'm not a purest, as long as its PS2 compatible I'm happy
Recently "upgraded" to a beige Dell Quietkey Keyboard I scavenged from somewhere, just for the retro feel, don't think its any better then the Black Compaq PS2 keyboard beforehand. I do have a beige Gateway keyboard as well. this IS a good keyboard as it doesn't suffer from N key rollover issues.
I got it for £1 but it must of come from a smoker as every inch is severely yellowed so put aside for my 1st retrobright experiment one day.
Also have a original Osbone Australia keyboard (the company not the world famous PC) but is too bulky to use in my currant setup.
Still using my Logitech nothing fancy laser scroll mouse I got in the early 2000's Buttons lasted much longer then my previous Gateway badged male intilmouse (it had balls, well 1)