I get the feeling your talking about super lights but I really enjoy single rcr lights like the sw v10r. I also like a new nailbender xml neutral p 60 I just got, and of course the sc600 is great.
To me 18650's are a better option for a powerful light. And if you get some there are a lot of single and double cell options for future lights you might want.
Run the strap from the grove through the inside of the rings instead of behind them the way it comes. There are some pictures here somewhere. Search zl mods.
If I were you I would take that alkaline out and not risk it leaking in your light. I think the eneloops will dim when they get low but I never really let mine get that low.