The Finer Wine Kits are popular. I was in the beta program for the Ultima line, making a Zinfandel. It came out great, although the price of the Ultima line is stiff.
Their Tavola line generally makes a decent red, and the Forte line is significantly better.
Note that FWK are not shelf stable -- they ship cold and must be either refrigerated, frozen, and the kit must be started. This is due to how the concentrate is made.