I've never seen a Jumbo, so I can't compare it, but my Colossus works great for me. I too wanted the water bottle holder, so I picked up on3 of their add on attachments. Even with a full bottle of water, my G27 w/ spare mag, a Kershaw JYD and Muk on it, plus assorted other odds and ends, it's still very wearable for quick day hikes.
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You're exactly right, and their website is a little misleading...
"For those who need something larger than their Jumbo™, we now offer the COLOSSUS™ Versipack™..."
It really isn't that much bigger, if at all.
I used to carry a Timbuk2 bag as my EDC but it didn't hold my gun very well and I wanted something smaller.
There are also times when I wish I could pack around a full sized notebook, but it's a small trade at this point.
You're right though, Wig, and consumers should take note! <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" /> [/quote]