I did a few Brewer's Best kits a few years ago, and they were ok. I would say they would have been better if they were fresher. They sit on the shelves a bit after being made.
I like getting kits from a good homebrew store. They would put together a nice kit out of fresh extract, and crush the specialty grains when you order to ensure peak quality. I've successfully bought extract kids from northernbrewer.com and austinhomebrew.com. I prefer austinhomebrew.com, because they have many recipes to choose from and they have excellent instructions. Since then, I've bought other items from brewmaster's warehouse (not extract kits) and I'm buying my next kit from them. It's a beginning kit for my future son-in-law for Christmas.
There is probably nothing wrong with any of the kits you listed, but freshest is always better and good instructions count for a lot!
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Broken Leg Brewery
Giving beer a leg to stand on since 2006
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