I have used Panasonic, Ryobi, Dewalt, Hitachi and Metabo. Many of these are made in various companies, including China. Many have different models aimed at different market segments. So their cheap range is usually Chinese, and better quality from other countries. Not to say chinese drills are bad, some can be fantastic, and others can be crap. For cabinet making I use a Metabo and love it. Features that are important to me are battery life, power, electric brake, 13mm chuck, Jacobs (ratchet style chuck), soft start, controllabel variable speed (some are better than others), comfort and fast charger, and a great feature is a build in LED to light up where you are drilling (great for cabinet work). I can make the following comments:
Panasonic 12v - EY range, 2 x 3.0 NiMH, rapid charger. Had all the features listed above, very expensive. Good whilst it lasted, bearings near chuck wore out, had great torque. Too expensive to repair and was worn out before batteries.
Ryobi - was a cheap one would put in similar class to Ozito.
Hitachi - They have a cheap range and good range. Cheap is crap, have always had issues with Hitachi, mainly in their switches/triggers failing. Didnt have many of the above features, but did have lithium batteries which lasted only a few months. The drill was $200. Many warantees do not cover batteries btw.
Dewalt - Great tools (as already mentioned is black & decker), many features but heavy and bulky.
Metabo - BS18 - are around $300 have all the features, Li batteries, heaps of torque and bets of all have a led light that lights up where you are drilling. Best feature for cabinet making. This model is made in China and engineered in Germany. So far the is the best drill I have used, was similar to the Panasonic but is more refined, LI batteries and cheaper.
The cheaper tools tend to not have quality batteries, quick charger, Jacob's chuck, electronic brake and LED. If anything ensure it has a good chuck. The keyless ones are rubbish if they dont grip well.
Cheers