All pretty similarly priced that I've seen. A bigger concern for me, if I were buying a kit, would be the reviews on the kits. A better review would be worth a couple more bucks IMO.
I'd say look to the shipping costs to really compare. Although I probally pay a few dollors more per kit @ my LHBS I save LOTS by not paying shipping. If that's not an option for you, see who has the best shipping rates!