dropzone

iTrader: (6)

I picked this thing up off eBay for $225 shipped.
http://www.smittybilt.com/product/index/84.htm
Comes with a tire chuck, 25` hose, 10 pound bottle, storage bag, handle and an adjustable regulator
I wanted it since it was way cheaper than the power tank version
Pros:
Adjustable regulator
Portable
Can reseat a blown bead
Fast, I aired up from 6-8 psi to 30 psi in about 40 secs on 35". Tire
Can run an air tool

Capacity is both a pro and con, first fill I tested it and was able to refill a 35" x12.5 x 15" 21 times. So past that you are back to using a compressor

Cons:
It is $20-30 to refill it
Weighs 27 lbs loaded
Takes up a bit of room
It would have been nice if it came with a mounting bracket, it is an additional $60

Overall I am happy with it