I've upgraded the bulb for the main headlight (look on Ebay) and i bought a set of fog lamps from TT, cheaper than the spots and not so bright so they don't blind everyone.
I ride with these on all the time and i'd say they have improved the lighting by 100%
HID is the route to go down, I got a 50w kit off Les for my 1150 (dip beam only). Really simple to fit and HUGE difference to the light output, anything else is a waste of money to be honest.