Thanks for the responses guys. I do have to say that I'm more concerned about dead pixels than having a DOA unit.
If you're worried about dead pixels, I'd recommend buying it directly from Apple. They have a no-hassle, no-questions asked 14-day return policy.
After that, I think Apple won't take it back unless it's really bad. Out of the 4 million pixels on the screen a few bad ones isn't a bad percentage. I've personally never seen a Mac with a stuck pixel. I think overall, the screens are good. The only issue I've encountered is image retention on my current Mac, but got the screen replaced through Applecare and it's all good now.
Generally, I think stuck pixels aren't warranty-able because it doesn't prevent you from using the machine properly. It's merely an annoyance. If you have a good case and you speak to a sympathetic employee, then you can probably get a new screen or replacement unit. But it's always just better and easier to return it within the 14 day period.
My IR case was so bad that it occurred after about 30 seconds of the screen being on. The Applecare rep on the phone was really not into replacing my screen. When I took it in to an AASP and once they saw it, they said it was awful and started the process to get the screen replaced. I'm a photographer and the image ghosting was affecting how I did my job. If I used Safari all the time, I wouldn't have noticed the IR. So it depend upon how you use it.
I've purchased from Adorama and B&H before, but never had to return anything. Amazon I've returned a bunch of stuff and they are also hassle free.
If you do buy one, I'd recommend getting Applecare because the retina MBPs are not very repair-friendly without warranty.