Shoulder Strap Camera Bags?

[JayPFoto]

Hey guys! I'm in the market for a new camera bag. I have a nice back pack for hiking and carrying a decent amount of equipment. I need something that is good for carrying a few lenses, a flash, cards, and batteries so that I can have them on me while I shoot. I'm looking at a few brands and was wondering if anyone has used them and what they think.

Here is what I am looking at..

Shootsac
www.shootsac.com
Ona Bags-The Union Street
www.onabags.com
Crumpler-6 million dollar bag
www.crumpler.com
Undfind-The One Bag
www.undfind.com

Thanks in advance for the feed back!

[motleypixel]

I'll weigh in on this.  I have 3 camera bags.  One large video camera bag that stores most of my gear at home.  One LowPro mid-size back-pack.  And this pack, which I thought was discontinued:  http://products.lowepro.com/product/Off-Trail-2,1981,7.htm

The only pack I ever carry with me is the 3rd pack.  I like the size and how it fits.  It's essentially a hip pack that will carry my 5DMK2 with a Canon 70-200/4L lens (the 2.8 version combo with the 5D is just a bit too large for the center compartment.  It will carry two lenses on each side up to about the size of a 70-200/4L lens size.  My 77mm threaded Samyang 14mm is almost too wide though for the lens pouches.  The top has an outside and inside zippered compartment that can carry several batteries and CF cards.  I put some hooks on the front side and clip my mono-pod to it.  It's a great pack, feels good and easy to slide around to one side of your hip and access gear.

I've never carried my LowePro backpack on my back in the field...it's just too awkward.

[JayPFoto]

Thanks! Yes, carrying a lowepro backpack while shooting is awkward. I definitively need something like your describing. After researching a bit I think I'm going to go with The One Bag by Undfind. Thanks for the insight!