A buddy of mine has a Craftsman 14.4V drill and loves it. Light weight and plenty of torque for the average homeowner's use. I got along for many years with a 9.6V Makita (heavier than today's 14.4V Craftsmans, I think), now have 3 19.2V Craftsmans -- one 1/2", one 3/8", and one 1/2" offset. They're pretty heavy, but I couldn't pass up the deal I got on them, and I like them. At work they all used 18V DeWalts, which is a super piece of equipment -- in general, I have a high opinion of DeWalt -- but very heavy.
If I were you, I'd go to Sears, which sells a bunch of name brands, and heft all of them to see how they feel. Hold them out at arm's length for a while. I think you'd be happy with the 14.4V drill.