I think the Fenix-LOD Cree-Q4-XRE is a very good quality AAA-light
with a bright output.
Although safer with Alkalines or NiMHs (Especially Eneloops), many
have said that 10440s can also be used.
I have mine on my keychain and the HAIII coating is proving to be
very tough. I can see no wear at all after deciding to put it on my
keychain about a month ago. Before that is was a shelf-queen.