Those keyboards are still out there. On my main computer at work I'm using a 1989 vintage IBM Model M keyboard, works great and looks like new. You can also get active PS/2 to USB converters so you can use these on modern machines.

A lot of us HTPC folks know about "big speakers", I've got mine hooked up to a big Pioneer AV receiver, with Dolby 5.1 and a 46" screen, works GREAT for games!