It's a bit bigger than the Arc 4, (and just destroys the Arc in output) but my direct drive PR-T modded E2e is a SWEET edc. dual brightness levels via gadgetlover's modified clickie, 6 or 70 lumens respectively. Roughly an hour and a half nearly flat output on full blast. On low, it will probably run for 13-15 hours.
She throws a ton, even by incan standards. 100+ yards, easily, and it's a BIG spot.
Did I mention she runs on Lion rechargeables, so I'm finished buying batteries for it right out of the box??
I top off/ rotate the batteries every week or so, keeps the batts like new.
300 dollars, is pushing it a bit, You might go over by like 50 bucks, but it's worth every red cent...
Frankly, I'm rethinking the U2 now. It just doesn't seem as cool anymore...