I dont know if the Craftsman set is better or cheaper (your link didnt show the normal or sale price, just said 1/2 off) but the Craftsman 145 piece tool kit is usually on sale a couple times near Christmas for around $130. I even got free shipping last year, they had an offer for free shipping on an over $100 purchase.
Nice thing about the Craftsman 145 piece set is they dont have any "filler" tools like allen wrenches or screwdrivers where they count all the seperate bits as a tool. The set is all 6 point and the only overlaps are in different drive size or deep well. http://www.sears.com/craftsman-145-pc-all-steel-easy-to-read-mechanics/p-00934142000P
and the tool list http://c.shld.net/assets/misc/IL34142.pdf
As an added bonus, Craftsman tools sell like hot cakes on craigslist. I bought a couple of the above sets and a dozen socket rails. I refilled all my missing sets around here and the farm, took the remaining sockets and put them on the rails and sold them on craigslist. I made more money than I paid for everything. I priced the sets at 1/2 normal retail that you pay in Sears and they sold well. Once in a while I had the normal problem with people wanting "package deal" pricing if they bought more than one set and I would knock off a couple bucks, if they pushed it more than that I just told them I sold the other sets they started asking about and only sold one set and that seemed to work well.
I havent tried selling Kobalt tools on craigslist, has anybody else? Do they move at 1/2 price? Some of these Dec. tool sales are great Feb. money makers when you split them up.