No, you would still have to deal with settings with a gaming router. As i said before, there is no difference between them and normal routers. It's all a marketing ploy.
If the Ps3 is showing a specific address but the router is handling doling them out you should take that IP address out of the PS3's settings- you may be getting a mismatch. The DNS servers are determined by your ISP- you should be able to find them in your router status and add them in. Did you put in the router's IP address and the Subnet mask as well?