Totally agree with Jason, try to get ones that are Lithium ion batteries and you'll be glad you did. They go a lot longer on a charge than regular Ni-cad. I'm a big tool junkie and have had a great deal of different brands of cordless tools. Craftsman is good but just stick with the better models in the Craftsman line up because some of their low cost entry level sets are not all that great. Dewalt is good but some of it is a bit overpriced IMO. Ryobi is hit or miss for me, I've had some decent experiences with them as well as some unsatisfactory ones, I kind'a equate them on the same level as Black & Decker in my opinion. I've also got some Porter Cable cordless drills and saws and have been surprising happy with those.
IMO for what you said you want to use them for (around the house stuff) my suggestion would be to buy something like this http://www.sears.com/craftsman-c3-19.2-volt-4-piece-lithium-combo/p-00938618000P?prdNo=2&blockNo=2&blockType=G2
It's 19.2gv lithium batt which is good. The drill is 1/2" and not 3/8" so if you ever need to use a bit bit in the drill you won;t have to find a turned down shank bit, plus 1/2" will have more power than anything you will need to drill around the house. It's got a circular saw as well as sawzall so if you ever do any home improvement then both those types of saws will cover you for any 2x4 or plywood cutting, plus you never realize how handy a sawzall actually is until you own one. And the price is pretty good too so since you are not using this set as an "on the job" set I'd say that Craftsman set would more than suit what your needs will be at home.