@jon_slider - all really good comments and I agree with you. Lest it seem we are taking this Aeon thread OT, it does all still pertain to the Aeon!
I received the Eagletac yesterday. Impressive little light. I'll enjoy using it from time to time! Compared to the Aeon it is brighter (I read 5/90/244 in my sphere), it allows me to use an RCR 123 (of which I have a huge stable), and it's relatively inexpensive. I also have a copper Tool with the Nichia AND the Ti Tool with the Nichia. Really like them both. Incidentally, on the 2 month old battery my Aeon reads .6/5/120.
I'm going to 'force' myself to carry the Eagletac today just to see what EDC is like with it. But I can tell you already that I prefer to carry the Aeon.
The battery issue is a real study. While the Aeon uses the disposable CR2 batteries, mine has been on the same battery for almost 2 months. Granted, I use it primarily on medium or low. I took the Eagletac with a freshly charged AW RCR this morning and (not a fair comparison) enjoyed using it mostly on low and medium with a few minutes on high. My battery reads 3.85 and will need to be charged. And all the dang blinky modes on the Eagletac aren't useful to me - in fact, they annoy me. They are easy enough to get around, but they still annoy me. And while this same gripe can be applied to the Aeon, the low is just not low enough.
So there's little doubt in my mind that that Aeon will remain my choice for EDC. When I need a brighter light for walking the dog in the wee hours, I might use the D25C, but will like revert back to my favorite, the HDS High CRI. And while I enjoy the Nichia equipped Tools, they spend most of the time in the nightstand.
Everyone is different and has different likes. $450 is a lot of money to spend for a small light, but that's the life of a flashaholic.
Please forgive all the rambling, but I've been struggling to come up with a car analogy. Although this analogy is 'off' because the price variables aren't the same, the performance and build quality analogy kinda makes sense to me. The Eagletac is a Corvette. It's powerful, fun to use and exciting. It's pretty reliable and you enjoy owning and 'driving' it. The Aeon is a Lexus ES350. Not all that fun to drive - not exciting. But really efficient, well made, easy on the eyes and you know it'll work when you 'hit the button.'
Edit -
Okay - just found the programmable moonlight mode. NOW I'm liking this Eagletac more. The lower low just made it more useful for me.