I'm looking to upgrade some of my stuff to be a bit better at resiting the weather. I'm already equipped with most things that I need to keep me dry in the snow/rain, but I'm mostly looking to upgrade my backpack.

I'm currently using my old bag that I've had since 2005, but it's really falling apart and is FAR FAR farrrr from being weather-resistant. I'm sick of putting my work clothes in a tied up grocery bag within this crummy bag, to keep my stuff dry for work.

So more specifically of what I'm looking for:
--Messenger bag (dividers/extra pockets are things that are of low priority -- unless theres a fancy area for tools)
--200$ or less (unless it is really worth it... my bad from 2005 was $30, so it had better last...)
--As large as humanly possible
--waterproof
--All black
--would HIGHLY prefer something with with yellow trim/accents <- this is the main thing i'm looking for (stupid, i know... but hey its what I want)
--since its a messenger bag, I am looking for something similar to what the chrome/timbuk2/etc bags have -> the "Cross-chest load stabilizer" so that you have another strap that straps... to the major cross strap. (basically so when i'm out of saddle the bag dosn't fall to my handlebars causing me to endo)

I'm a LARGE fan of the chrome bags, but they don't have anything that meet my all black/yellow criteria, otherwise I'd be all over em.

I understand colour may not be a big deal, but its something that I'm going to have for a long time, might as well invest in it the way that I want it.

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also maybe some recommendations on pants, I don't suspect there is anything that could resist water for 9 miles and not have to change for work? If there is let me know. (black only)

cheers,
kyle