Hi,
While I have been VERY happy using my DIR-655 for the most part, all wireless routers have limitations for expansion across your home.... I got my TrendNet TEW-640MB installed last night, and it talks to the 655 perfectly, and now I have 4 ethernet ports at distance across my house. I have also used a couple TrendNet TEW647Ga single port wireless bridge for other parts of my home, but with only a single ethernet port, you still need a little switch/hub to get the extra ports....
Because these units speak .11N at 300 Mbps, it takes full advantage of the technology the 655 gave me when I bought it back in 2009 (??).....
I am not sure if DLink makes a comparable unit, but if they don't they should....