Yeah, as long as it's the exact same model they should give you 10% off the advertised price. The girl seemed really snotty about giving me the deal, which I don't understand. It's not her money, and it is their policy.
I have Craftsman cordless tool and apart from the shoddy jigsaw have had absolutely no problems with the ones I use most often (impact driver, drill and skill saw). I don't have experience with that many other manufactures but with two Li-Ion batteries you always have enough power around to finish any size job.
I think the best thing you can do is not be a brand whore and spend your money on the tools you use most often. For instance get a great impact driver/drill combo and then buy cheap corded versions of the tools you rarely use.