Here are my reds:
-Peak Mattrhorn 3 LED -- nice, but alot of light (1xAAA)
-CMG Infinity (NOT Gerber) -- very nice, looooong run time, alot easier to operate with the bezel twisty than the Gerber version which has a tailcap twisty, wish it was AAA size (1xAA)
-Gerber Infinity -- see CMG above, terrible artifacts in beam (1xAA)
-Inova Microlight -- tiny, 3 output levels--low, very low and flash (button cell)
-Inova 24/7 -- nice reds + white and all the crazy blinks
see this interactive web page - click on products, 24/7, modes , but not as pocketable as the others, but it does have a clip. Just plain cool, get one of these even if you chose something else
(1xCR123)
-Fauxton -- nice, small, cheap - replaced white LED with Red and went from 2x2016 to 1x2032
-SO-LED from County Comm -- lots of attachment options, low level,
info
How much throw and lumens do you actually need from a red light you will be using to preserve night vision? A low red will give suprising results with dark-adapted eyes. They take a little getting used to, weird color renditions--problem if you are using colored maps and need to see the different colors (if this is the case, get a real looooow white)
My favorite in the above is the CMG Infinity with the Peak Matterhorn in close 2nd. I think if I get a Peak Matterhorn 1 LED head, that will take 1st place. These are nice lanyard-around-the-neck size.