I have one of these kits, its really nice! (mine are blue, not red, but just look up redhead lighting kits for reviews)
three lights should be enough with those other lights to get some even lighting. and these have dimmers so you can use one for shadow filler
http://www.amazon.com/Fancierstudio-Barndoor-Lighting-Carrying-FL100RB/dp/B00507HC9K