+1 for the Romisens
i have two focusables, RC-C6 & RC-29. you'll have a light that covers the whole range, very cool for an EDC. there are definitely beam artifacts but the pretty much disappear when adjusted to flood.
if you're really hardcore about lots of flood and no artifacts then you might look at some of the lights McGizmo has made. he has a few i've seen that have no reflector, no optic (except the glass dome that is installed over the emitter). not sure how easy it would be to get your hands on one but it'll at least help you expand your search. i know i've seen at least one 3 volt Surefire he modded in this matter.