Here, in the U.S., Rockwell would be a good choice, one reason being is that the old standby company has a "battery replacement for life" program. The batteries (mines an 18 volt) come with a charger, of course, but after some time… usually about a year, they refuse to hold a decent charge. Simply notify Rockwell by e-mail and they send out one for free and even pay the shipping. Takes about 3 weeks from the time they are notified.
One other hint… you need to understand the difference between a drill/driver and an "impact driver". "An impact driver combines much higher rotational torque than traditional drills, with fast paced rotational tapping (not to be confused with hammer drills with deliver tapping from the rear to help power through concrete and other hard materials) which serves to nudge the fastener along while keeping the screw tip in place without spinning out of the slots."
The impact driver tends to be only slightly more expensive that a traditional drill/driver, but far superior.
One caveat... if you have several drill bits or screw driving bits already, you'll find (again, relying on experience here) that you'll have to buy all new ones if you elect to go with the "impact drill/driver" combo, since the attachment device on that type is entirely different than the old "screw" chuck found on just drills. The newer ones are 'quick change' and have a groove around the attach area that simply pushes into the chuck and releases by a tug outwards on the chuck…
More power to the drill bit or screw driver is applied through the impact drill/driver than just a 'drill/driver', even accounting for similar voltage models.
If, on the other hand, you don't have any left overs, be sure you buy those that will fit an impact drill/driver.
As mentioned, use only "Philips head" screw bits or even better, the "star" drivers.