Hi,
totally understand that, there needs to be a good reason for adding extra weight.
Not sure if you know, but I'm kinda an advocate for the PDC. I love that machine. [eek] [scared] [big grin]
Depending on what and which manufacturer you're looking for/at in a drill/driver, you will have a hard time finding any real substitute/equivalent among competitors for the PDC.
If looking at Bosch, they don't have any cordless drill/driver that will go as high as 3800rpm. If that's not your concern you can get one with up to 2000 rpm.
Looking at Fein or Metabo they currently offer drill/drivers up to 3800rpm, but that would mean investing in a new battery platform - probably as with the PDC for you?
The Fein could be interesting if you're also in the market for one of their 18V multitools.
Personally, and I can't say that often enough I simply love the PDC, maybe the best machine I ever bought. At least that's how I feel about it - but I also have all the Centrotec accessories/consumables for it - which enormously adds to my feelings for it and how pleased I am with it.
Speaking about Bosch, I have to admit I really have a hard time finding the right tools on the North American website, totally different names/descriptions ... But look for a brushless drill/driver with metal chuck. Probably along the lines of this one: 18 V EC Brushless Brute Tough™ 1/2 In. Drill/Driver Kit, there should be a variant offering an additional percussion/hammer mode. But there are also others that a quite interesting - and you should definitely ask/look for the newer batteries.
I hope someone how knows more about Bosch's NA line up chimes in and can point you in the right direction.
Kind regards,
Oliver