Merrell and Dansko really are great foot support. I just finally replaced my "most comfortable walking shoes ever" from Merrell and I had them for like 8 years.
I recently bought some new Danskos after staying away for a while (the clog style just wasn't working for me anymore) and these have a less clunky and more flexible sole, lots of arch support. They're really comfortable, and look nicer on than they do in the picture: http://www.zappos.com/n/p/dp/23804214/c/82.html
Merrell's are quite a bit cheaper, though, and I think their shoes are wonderful. It's hard to find decent-looking styles for work in most stores, although on their website they have some that look like they might work.