Joe,
I would say give the D-Link a try if that's the way you are leaning. Referring to the DIR-655 specifically, there must be a reason it received rave reviews - and truth be told I wanted it to work as it had some really cool features I would have found useful. However both my NAS and my Sonos controller were just quirky on wireless with it. Replacing with the Linksys cured my issues. But maybe the D-Link will work fine for you? Peter seems fine with his judging by his post.
When you had your DIR-655 troubles, did you update the firmware? Just wondered - as there have been at least a couple of updates since it was released. Perhaps Zune compatibility was an issue.
And FWIW - on mine, I've got the wifi set up to be WPA2 encrypted. I have no problems/disconnects when VPN-ing in to work on XP, Vista, and OSX machines connected via wifi.
