I tried the "Super White" bulbs and didn't like them. Made everything too blue. I bought regular halogens that are 120/55 watts from JC Whitney. I think they were $12 each. They made a big difference.
I hooked some driving lights up on another truck with a three position toggle switch that made them either come on with the high beams, come on when any light was on, or not come on at all. All I did was to tie into one of the high beam hot wires and the hot wire to one of the running lights, run those to the switch, one on one side and one to the other, and then from the switch to the solenoid for the driving lights. Worked real nice. I don't know the proper name for the switch but it had three positions, on-off-on and three terminals(I think!) on the back.
Good luck!
Scott