Got enough mice in their dawg?
Tis a nice setup that, hopefully one day I'll have money/space for 3 monitors. (That match).

I've got another one of those keyboards under the worktop as well, on top of another PC I have (file server).
It's an MX5500 keyboard set, I got an extra set via a logitech warranty replacement.
Initially, I had an MX5500 keyboard set, which includes a bluetooth keyboard and an MX Revolution mouse, and I also had a standalone MX Revolution (and RF one).
The BT mouse's internal buttons for the left click worn away, so it'd double and triple click when I only clicked once, and the RF mouse's scroll wheel and receiver were knackered, so logitech sent me out a brand new MX 5500 set and RF MX Revo, and they didn't want the old ones.
So yeah, I managed to fix the problems with my broken mice by taking apart my two broken MX revos and combining the working parts out of them, so I ended up with 3 working MX revos and two keyboards.
The other keyboard not seen is a bit temperamental, but it's fine because I use it very rarely on the other PC, it's just nice and convenient to have a wireless keyboard I can use when I need to do something in its bios.