oooo, excellent question!
As someone mentioned before good colour rendition is quite important. If the light is too blue you might not see the different between a fresh zombie and a living person.
Batteries, well anything goes really. Would probably have to make a gaffer-tape-conversion anyhow to get loads of runtime and ability to run on anything from a car battery to a bunch of AA.
A headlamp and/or shoulder mounted light might be a good idea, leaving both hands free for use of any kind of weapon you could get hold of.
Still, best bet is probably to maintain a very tight light diciplin, hide on the second floor and knock down the stairway.
As for best zombie flick... hmmm... I'd like to recommend the japanese movie Tokyo Zombie, a very charming movie. Also there is a really good recent movie called Fido which also is quite charming. More classic zombie genre you will never go wrong with the original Romero trilogy. But stay away from the remakes! (ok Night of the dead is B&W, but it is a classic!). Oh and yeah Return of the Living Dead 1&2 are really funny!
(yes I am a fan of zombie movies if you didn't happen to notice
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