The blog post you mention sounds familiar - isn't that a weekly topic for the bloggers?

You have plenty of miles, so availability pending, you can go anywhere. But with only 1 week, do you want to? I'd stick to the Americas or Europe with 1 week to work with. Since you're heavy on United/UR, just do some searches on United.com. They show almost all partner availability, so no need for AwardNexus.