This is exactly what you're looking for:
http://www.amazon.com/Logitech-Illum.../dp/B001F51G16
I have it. I like it. But you might want to wait until a deal pops up for it:
http://slickdeals.net/forums/sdsear...=1&s=&search=Logitech+Illuminated&showposts=0
Slickdeals has this nice feature where you can track threads with specific keywords and get an email when someone posts a topic about it.
Of all the keyboards at BB I narrowed it down to the K800 (the one in the OP), and this one that mrrpes3 linked to. I chose the K800 over the wired one based only on the way the keys felt. I would recommend you try these out before buying. Keyboards and mice, if you use them enough to notice, are something you should try before buying.
If you have the patience try them in store until you decide on one, then find a deal online.