Brand new 27' iMac with monitor flaws????

I would certainly address this immediately; you didn't say when or where you purchased it - if it was from the online Apple store, contact them; if it was an Apple brick & mortar store, take it in. If it was from a reseller, you'll have to deal with them. In any case, I wouldn't wait more than 24 hours after purchase - you paid top dollar and you can expect a flawless machine. When I purchased my newest iMac, I had them open the package in the store to check the case, screen, etc. and then had them power it up to make sure there were no flaws on the display. I figured it would be much easier to return/exchange it on the spot if necessary. Everything was absolutely perfect, so I took it home.

Good luck with Best Buy then - if you have time, post back with the results; it'd be interesting to learn how they handle it.

Do not wait to return this. When I bought my 27" iMac and got it home, I noticed 4 dead pixels immediately. I phoned the store up and they agreed to take it back for an exchange. When I did go back to exchange it, I had them unbox and test before I left. The replacement had dead pixels, the next one had a chip in the glass underneath the pane, and finally the last one was 100% without problems. It's not been a full year with mine yet and already now the screen exhibits blurry/grey pixels on the top which I had a tech come out and replace the LG screen inside, only to have the replacement have more dead pixels. For me personally 2k for a rig with display issues is not worth it. I wouldn't hesitate to exchange/return ASAP!

Glad to hear that worked out to your satisfaction!

Well, if you really want it, why don't you consider going about it the way I did: go to an Apple or Apple reseller (I mean a nothing-but-Mac store), buy it, and have them open the box and power it up (caveat: it will go through the initial setup immediately) - you would then see the screen, etc. and can make an immediate decision: take it home or return it.