I have two 12V B&D Firestorm systems. On both the chargers went bad making the drills and add-ons useless. On reccomendation of others at my woodworking forum, I bought a 14V DeWalt. It's charger is much better made than the Firestorm and it is variable voltage. This means I can charge my 12V batts on it also. So, now I have three working cordless drills. The DeWalt seems to be the brand of choice with professionals. I like mine but find it heavy. And, with my sore, aging shoulders, I have to admit I have trouble using it.
However, the free battery warranty from Rigid seems hard to beat and the brand has a good reputation.
Personally, if I were shopping today, I would go for the Rigid.
BTW, DeWalt is very expensive. My drill was $260.00. I made a lifetime purchase but, for me and my shoulders, it proved a false economy.