I've never done HDDR, but it just can't compare to the Cirque experience! They really are apples and oranges, but if you can only pick one, I'd go for Cirque.
I noticed you have a 4 y/o. Might be a little young for the show, so maybe you can drop her off at one of the kid's clubs. I don't have kids though, so maybe someone can help you more on that.