A lot of guys on the Walther Forum have purchased from CDNN. I was tempted to buy from them myself, but just decided to get one locally.
The ones at CDNN will come w/ 10 round mags, though. Be aware of that. At the time the stainless USPc was made, they all came w/ 10 rounders.
I really like my USPc in 9mm and recommend it. I prefer it to my fullsize USP now.
Glad to have ya aboard