There are some David clothes in the pipeline. If you read the DAZ forums, there are previews of fantasy and SF clothes for him.

But there are never as many clothes for the males as for the females. And toons seem to be really big these days.

Vote with your wallet. If you want more David stuff, buy the David offerings they have.

And check out PoserPros. They've got some nice stuff for David and SP, some of it for Pro Club prices.