I just ordered two Photon Freedom's from CFR Lights.If you go real-thing Photon, get the Freedom. I did get the Ritter version because some goes back to ETS and because I've carried Photon Freedoms around my neck for years, but the standard black models now have a 2X brighter LED(Same packaging, this is the second time they've upgraded) for half the price. CFR has the lowest price, plus free shipping. As for the Proton, closest thing to perfection I've found if you want a full EDC light, but too big for keychain carry.
http://www.cfrlights.com/servlet/the-4/photon-freedom-micro,-LRI,/Detail
If you find yourself using the Freedom enough...Consider the ReX, which has an awesome charging system. I've taken batteries rolling around in people's cars and charged my light off them, cost per charge is one third of a cent with a NIMH, and a D cell will get you twenty charges for longer trips. However, get the Freedom first, you'll get hooked on the interface. I'm converted purely to lights with the Freedom interface, and use the basic on/off ones for kits and loaners.
Thank You.