Yeah, I guess Holland would be pretty cool... I think it would be a good idea to have somewhere in a different timezone though. At the moment we've got two cities in roughly the same timezone as Holland (London and St Pete). That's why I think I'd prefer somewhere around Asia / Australasia or Africa for the next one.
Plus if we did Holland I don't know how I'd fit it on the map (jk, it wouldn't be a problem, I'm sure).