Oh boy, I want his flashlight collection!!! He has a nice sellection of lights already. Maybe buy him a nice custom light from one of the many reputable modders on this site. It also looks like he has some p60 compatible flashlights. There are some good custom p60 drop ins you could buy for him as well. Good luck
+1
after seeing the lights you listed, this is exactly what i tought too
drop ins are modules that replace the lamps or modules inside the Surefire 6P or similar lights, this modules can be brighter or longer running, and tougher than the standard ones.
Malkoff M60 is a good choice or an MC-E for wow factor (its very bright), they sell for around $55 and $125 respectively, check this website:
malkoffdevices.com
There are some small keychain customs like the sapphire Titanium / arc aaa titanium / la petit killer, bigger customs are more expensive than your budget.
there is also the Ra Clicky, which is a very good flashlight (check if he has one)
from the list you showed it seems he pretty much tries to cover all bases (except for different wavelenghts, the only one that differs from this statement is the Vampire), do you have an idea of what does he likes the most or what combination of these characteristics he likes more?:
portability
runtime
brightness
toughness
reliability
ease of use
multifunction
material
or maybe what do you find him playing with more
I would love if my girlfriend researched about gifting me a light, but i already like the gifts she choses for me everytime, she knows me pretty well.