Howdy to ya Slotshot!
I have one of those cs020 and am proud to say that I have tried to wear mine out. I encountered the same answer as you on seasoning the cs020, so I would say yer ready for some smoking.
Make sure you ready Smokin's 101s as a guide to help with the 1st few smokes.
As far as those packers that the butcher was trying to impress ya with, it is my understanding that 70% of all biskets are choice grade???...so there might be a little difference in the top of the list as opposed to smoking the bottom choice,but heck, I've smoked some select ones that was more of a brisket then some of the choice packers.Oh well!
Now ya won't hear this much in Texas, but them their PBs are AWESOME! Don't believe me try for yourself and make sure you try some of Smokin's finishing sauce with them,really!
Hey if you run into some more questions on the cs020, just ask!