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Royal Oak is good. I know that is who makes BGE and I read they also make Publix brand as well. Who knows. Cowboy is good/not so good depending on with whom you talk.
Good site to bookmark.
Whiz - Publix up to $5.99 lb if you want to up date your site.
I have been using BGE but just splurged on 3 bags of Wicked Good. I like it very much - lights easily, burns clean and gives off no blue "volatile" smoke upon lighting. I would use it all the time, but as said above, shipping is brutal. I spent $41 on the charcoal and $42 to get it to me - ouch!-BD
I'm in Wisconsin as well and I use the Grove Charcoal, and have been for years in my old Weber Kettle. Come to think of it my father used it all the time as well, so I guess that's about 15-20 years of Grove. Burns great, food tastes great!
However I will admit a small conflict of interest, The company is owned by the father of a friend of mine. So I may have a bit of a bias. I believe all the charcoal is made in Canada now (blame the EPA and OSHA), but the company is located in Cedar Grove, about 40 minutes drive north of Milwaukee.