I prefer white LED's, for the nicer LED beam. Colored LED's have a ringy beam (red isn't as bad as the others), and you have three of them in the A2. Looks something like the Olympic symbol, with colored LED's.
I understand the idea behind red, to preserve night vision, but on the A2, it's too easy to accidentally activate the 50 Lumen incandescent lamp, and there goes your night vision. I prefer a dedicated red flashlight, to preserve night vision. The original Surefire L1-HA-RD (hex bezel with a red LED) is great, if used properly. Need the F04 Beam Shaper, with the latest L1-HA-RD.
By the way, using the F05 (red filter) with white LED's, doesn't work very well, unless your goal is an extremely dim red light. Colored filters don't work well with LED's.