Here's the better question, what's the budget? Newer tools are lightyears away from those 14v nicad dewalts.. you can buy Milwaukee's 12v fuel impact driver and drill and it will run circles around those dewalts..
This is my recommendation.. consider what he has, what he actually uses, and if he has multiple cordless tools - REALIZE - that you are basically picking a new battery platform for him.. so don't base your purchase, on just THIS purchase.. it would be wise to consider the other tools he COULD buy later that will use the same batteries and charger.. my recommendation would be Milwaukee.. it will almost always be Milwaukee, simply because they offer a lot more choices in tools, andhave the most extensive line of leading tools revelant in today's marketet.. also, all batteries are not created equal.. Porter cable is cheaper for a reason.
Here is what I suggest - (brb)
1 - If budget allows - this set is $250 off until Christmas, but it's $399
http://www.homedepot.com/p/Milwauke...n-Cordless-Combo-Kit-6-Tool-2696-26/203230032
2 - $199, this is a top of the line, industry leading brushless 12v set.. it's the M12 fuel drill, fuel impact driver, 2 batteries (one is an XC pack), charger, and FREE m12 ratchet, which is also one of the best among professional brands, and normally $100 by itself..
http://www.homedepot.com/p/Milwauke...n-Ratchet-Tool-Only-2594-22-2457-20/205044694
Dammit - out of stock now.. here's another deal, with the m12 fuel 1/2" hammer drill, impact driver, and free m12 jigsaw.. same price - $199
http://www.homedepot.com/s/Milwaukee%20m12?NCNI-5
If you'd like to see what Milwaukee's M12 fuel can do, here's a demo against an 18v Makita, both using an 18" long ship auger bit...
Your next gift could be an m12 LED light, or circular saw, or heated jacket, or jigsaw, or impact wrench, or screwdriver, or (you see where I'm going with this?) be a good son, make the right choice.. lol.
All of HD Milwaukee M12 deals here -
http://www.homedepot.com/s/Milwaukee%20m12?NCNI-5
All of HD Milwaukee m18 deals -
http://www.homedepot.com/s/Milwaukee%20M18?NCNI-5
Just FYI - I actually have that brushless Dewalt set you're looking at, at work on one truck.. on my other work truck, I have Milwaukee's BRUSHED M18 drill and impact driver.. the Milwaukee is considerably stronger running small lags into a telephone pole side by side with each other, and that is the honest truth. This is the m18 set I have on that truck, and I own the fuel line of these at home as well..
M18 BRUSHED impact driver and hammer drill with the 3.0 battery packs - $249
http://www.homedepot.com/p/Milwauke...-Driver-XC-Combo-Kit-2-Tool-2697-22/203106552
$299 - Milwaukee's brushless (not fuel, same torque ratings as brushed- just brushless), drill, impact driver, free brushed circular saw
http://www.homedepot.com/p/Milwauke...2-in-Circular-Saw-2799-22CX-2630-20/300508068
Tired of copying and pasting - just look at all the deals online -
http://www.homedepot.com/s/Milwaukee%20m18%20combo%20kit?NCNI-5
Milwaukee tiers are as follows -
M18 fuel - top of the line brushless, (digitally controlled), with their powestate motors
M18 Brushless - digitally controlled brushless motors, same or similar torque rating as brushed tools, just with the new tech of brushless.
M18 - brushed tools.. tried and true technology, reliable, strong
There is no wrong choice here.. the brushed tools are great.
Ok I'm done, point made.. here is the Milwaukee site, you can look at all the other tools they make yourself. The site is very easy to navigate, and has no annoying pop up windows like Dewalts site.
https://www.milwaukeetool.com/