For briskets and PPB I make my own, but for an all purpose, delicious sauce that's great on beef pork or chicken, I have to go with Curley's. They are an outfit out of Kansas and make the best bottled sauce I've ever bought.
Not sure if you can find it in your area, but you can buy it online here:
www.bbqsauce.com
For rubs, well there are a good many out there and a whole ton of homemade recipes that will knock you over at how good they are.
For a store bought, again, hands down eye-opening great is Strawberry's Grand Champion Rub. This stuff is unbelievably good on chicken and ribs.
The maker started with running a restaurant, then catering, then started winning comps and now has been selling his seasoning all over the midwest. Small town barbecue flavor kickin' butt, is what I say...this stuff is good!
You can also buy it online here or get directions to their restaurant.
www.strawsbbq.com
Anyway, just my 2 cents. Hope this helps!