I have dented two drivers. One on the sole (I was mad about ANOTHER miss hit drive, slammed it on the ground and there was a rock just under the surface) and one on the top (my buddies and I were having a compitition on who could hit their (right handed) drivers farther left handed and I miss hit and caught the top). The top dent did not change the performance of the driver, it still pounds the ball 280 - 300 yards 5 years after the dent was put into it. It is just an eye sore and can be very distracting if you are not used to it. I find that I sometimes catch myself looking at the dent instead of the ball. As far as I know you can not pull the dent out. Do NOT try to fill it because this will dramatically change the weight of the head an could have disasterous results.
As for matching the driver to the set, there is absolutely no benefit of doing this, unless you are extremely picky about all your
clubs matching. Take a look in most pro golfer's bags - 1 out of every 50 will have the same brand from driver to putter. Go to a few different golf shops and try what is out there. Don't worry about brand names - pick which ever one works best for you.