Re: backpack??
Well, you have quite a few options that will fit your applications. It sounds like an "assault" style pack is what you're looking for. Within your budget nearly everything will be imported so if you're looking for "Made in the USA" it ain't going to happen in that price range unless it is used.
The advice offered by the other members here is solid. I'd look at Maxpedition and 5.11 Tactical packs. Yes, there are other makes/models out there that could work as well but, based on my research, you'll get the most consistant quality & reliability out of the brands above (believe me, I have done a LOT of research lately on assault packs and those listed here consistantly receive positive reviews & work within your budget). Some models to look at in particular that should run under $125.00:
--5.11 Tactical: RUSH 24, comes in Black, OD Green & Dry Earth;
--Maxpedition: Condor II and Falcon II, comes in Black, Foliage Green, Khaki, OD Green and ACU camo;
If you can stretch the budget a bit you can include CamelBak to this list. They have a full selection of camo options & some very well thought out, durable packs.
Best of luck to you.
Ceylon