AC Delco shocks and struts are made by Monroe. they are usually sensa trak's in disguise.
You are actually better off with the KYB, they are built better, designed to last and give a much nicer ride.
the monroe's to me have gone down in quality, they don't offer the ride and handling like they used to.
both brands give a lifetime warranty, KYB offers a customer satisfaction warranty. so when you want a new set, no problem. Monroe is more finicky about it, and ususally wants validated reasons, not, "because they're bad".
my second choice is bilstein, only because of the price. I believe AZ still has the lifetime warranty on them, but the KYB's are less expensive with the same warranty.
Gabriel's are very good as well.