In addition to the reliability research mentioned in the sticky, my site also offers uniquely thorough price comparisons. The most popular are listed on the Enclave page here:
Buick Enclave information
When I first entered the Enclave data a couple of months ago I was surprised to find that adjusting for features often makes the Enclave a bit less expensive than the Acadia.
Since I started the site no GM vehicle has made it into the top 40 comparisons.
Then I ran the latest rankings today, and the Enclave cracked the top 40. Interesting that it would be the first GM vehicle to do this (along with the Tahoe/Suburban, also on the latest list), when it's not even out yet.