What can you say about the originator?
I've been using CamelBaks since I first saw them many years ago. Whether in one of my packs, or strapped onto my tac vest for playing airsoft, they've never let me down. My personal preference is for the 100oz.
The Omega's wide mouth filler cap was the greatest upgrade CamelBak could have done. The narrower cap of the earlier version did not make cleaning very easy.
Do yourself a big favor, get the cleaning kit. Also, hit a homebrew supply shop and get a bottle brush for cleaning every little inch along the seams. If you don't stay on top of keeping them clean, that wonderful black biological sludge that grows in the crevices along the seams can leave you feeling like a king on the throne for hours...