I have a couple of P7 and while they work well, I think the MC-e lights put more usable light in front of you.. Most P7's throw a very wide beam.. I would seriously consider either the Romisen R5 - 300 lumens OTF -
http://www.shiningbeam.com/servlet/t...4-II-R5/Detail
The new MG P-Rocket Cree XP-G R5 450+ Lumens - Cool White w/ OP Reflector -
http://www.shiningbeam.com/servlet/t...-rocket/Detail
If price is not an option the best and brightest single cell light is the Elektrolumens EDC-MCE Light -
http://elektrolumens.com/EDC-P7/EDC-MCE.html
Pictures posted below are of the MCE light.. Best source for 18650 cells overseas is HKequipment seller on ebay, he buys direct from Ultrafire, that is why his prices are a little higher.. I have yet to receive a bad cell from them.. Bought cheaper from other sellers and they were either factory 2nd or fakes..
Japanese UF2600's -
http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT
Chinese UF 3000's - This is what I use -
http://cgi.ebay.com/Ultrafire-Rechar...item4cef162ffa