Jim, you're likely to get as many different answers as replies. There are lots of good ones out there.
I have carried a Nitecore EX11 V2. for a couple years now.
Small, lightweight, VERY bright, indestructible. I have one on me at all times, and one in my nightstand.
Here's the URL at Amazon:
http://www.amazon.com/Nitecore-EX11-.../dp/B0042FW1LU
From Amazon:
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Features:
Unique electronically controlled "Smart PD" switch - designed for reliability
'Infinitely Variable' digitally controlled brightness system
Intuitive and simple user interface
Strobe and SOS functionality
Military grade aluminum alloy construction for strength and durability
Compact and lightweight - suitable for EDC (every day carry)
Mil-spec type III hard-anodized
Impact resistant in accordance with US Mil-STD-810F
Waterproof to IPX-8 standard, underwater 2m
Broad voltage fully regulated circuit - compatible with numerous battery
chemistries such as Li-ion and NiMH
High intensity Cree XP-G R5 LED with 50,000 hour life and maximum output of 200 lumens
Ultra clear impact-resistant optical lens and computer designed metal reflector
Military grade 550 parachute cord tactical lanyard
Ability to tailstand for use as a candle light
Dimension: diameter 21.5mm, length 76mm
Weight: 44g
Included accessoried: Lanyard, spare waterproof O-ring
Runtime:
Maximum output 200 lumens, for about 1 hours
Minimum output 5 lumens, for about 80 hours
Strobe output of 200 lumens for about 2 hours
You'll notice that on Amazon it gets some bad reviews, but in my experience, it's been a great light. I've owned a bunch. YMMV
Hope it helps,
Tom