2 weeks in Europe or US/Canada?
Which would you do?
2 weeks Europe (up to 17 days or so) - a guided tour and stop over in London for a night.
2 weeks in the US/Canada (up to 17 days or so) - 2 nights LA doing Disneyland and the like, 2 nights in Vegas and a possible Rockies/Alaska cruise/train tour.
This is your one and only holiday until the kids have left home. Your only chance to leave the kids before they are old enough to want to come. Possibly the only time you'll have the money between now and when your in your 40's. Your looking at going between March-May 2012.