Personally I opted for the Ultra. I too was looking at the Survivor model, but in the end I am VERY happy I went with the Ultra. Just a bit nicer finish and trigger and I am a long barrel freak. But mine has Laminates, which I love. However I love the Choate Varmint as well. Just depends on what you can afford and what you are willing to spend. The fluted Choate is a lot nicer than that of the Survivor, but in terms of performance, it will be close. I like the longer barrels and I went with the 24". Either way the performance will still be there.
Your call
-Aaron