The G15 had stacks of promise. 18 programmable macro keys, bindable in three modes to give a whopping total of... (takes socks off for hard maths) 54 functions! Probably.
With media controls and more moody blue lighting and rubber than Lothario's living room, things look good. It's pricey, though, and there are precious few plugins you'd want to use with the LCD.
It's stablemate the G11 is only missing the screen, and is much cheaper. We know which we'd pick.