We've gone over it before, and I'm sure we will many more times before this thread is locked....
Some of the MANY possible reasons not to purchase:
1) Those lights are not nearly as versatile with their power options.
2) They are more expensive to operate
3) Some of them are totally incapable of being used with rechargable cells
4) Safety concerns. Two mismatched alkaline or NiMH cells leak. Two mismatched lithium cells go :poof:
5) Many of those "quality" lights you mention are marketing as being somehow "superior". There is an image that such "superior" lights have to use a "superior" cell. 20 years ago, the ONLY cell superior to consumer alkalines were CR123 cells. Even though CR123's are not longer king of the mountain, that image of them formed over the past two decades is hard to shake. This also ties in with "superior" brand flashlight snobbery which some members show an abundance of.
6) Logistics complications with other electronics and travel. Almost no other electronics use CR123's. Some methods of travel have SEVERE restrictions with lithium travel. Some places in the world have never even heard of CR123's, good luck getting replacements there.
Do we really need to continue??