G11 = 18 G-keys (no LCD)
G15 v1 = 18 G-keys + mono LCD
G15 v2 = 6 G-keys + mono LCD
G19 = 12 G-keys + color LCD

The LCD is pretty much useless, although it can be handy for secondary information display. I have a G15 v1, have had it for a couple years at least, and I have never used the LCD, but I make good use of the G-keys (a couple examples -- labelled pictures -- of my G15 layouts: http://www.lavishsoft.com/wiki/index...h_G15_Keyboard ).

If I were choosing between those 4 keyboards to purchase one today, I would get the G11. The others have inflated cost because of the useless LCD, and then they gimp the number of buttons.

So I concur, G11 and if you need more controls, add devices from there (x-keys, n52, whatever). Foot pedal is a pretty good idea since it requires no hand movement BUT is pretty expensive for only having 3 buttons.