Apologies for not knowing if you're an extract brewer or not, but if you are, you're probably going to want to swap out some extract (a pound or two) for corn sugar, to keep your barleywine from being cloyingly sweet, since extract doesn't ferment out as much as you'll probably want it to for such a huge beer. Check out the Jamil show on barleywines for tips and recipes (
English or
American styles), whether you're doing AG or extract. Jamil's Book,
Brewing Classic Styles is also a great resource.
Otherwise, I've not hear anything but good things about AHS kits, and I recommend them myself.