G11/G15 originals with 18 keys are the best thing ever if you want to run two clients on one computer, but it is kind of limited because of the keystroke limitation, and you will run out of keys. X-Keys will help you healbot and control alts much easier - I've iced my healbot project until I get an X-Keys or an alternative, and a second computer.

Currently the bottom segment of keys on my G11 control movement of my second client, allowing me to perfectly duablox Gruul, Void Reaver, etc. It's everything you need for 2-3 clients on one machine.