Pacific is Walmart level junk. Surly is a small company owned by QBP that imports frames from Taiwan. I own two. They're good frames (only recently began offering complete bikes). A bit heavy but bombproof.
If I were going to buy a complete bike, it would be Giant, Trek/Gary Fisher, Surly, Specialized, or Niner (from the list you provide). That said, I haven't purchased a complete bike since 1998. I find it cheaper and easier to build my own from parts. I typically strip parts from an old bike in my stable and/or use parts I have on hand to get the build going, then buy the other stuff I may need.
In all honesty, you can't go wrong with Giant, Trek/Gary Fisher and Specialized. They didn't get where they are today by being junk.
Chris