Personally I'd never buy a premium product from Zotac because they always felt like a second tier AIB partner like XFX and Palit, people mostly buy their products because it's cheaper than similar offerings from others.
Why don't you take a look at the MSI offerings like
@Chaos already suggested ? I've never had any problems with their products.
but I have read that a few people have got Gigabyte Xtreme Gaming cards with QC issues like some heat sink fins getting bent or one of the fans touching the housing.
You just have to roll the dice on this one when it comes to GPU's these days, every manufacturer seems to have one problem or the other and no one can really guarantee a quality product it seems.
There will always be problems for any and all gpu's, you'll have to settle for something with the least number of complaints.
I just checked user reviews for the AMP extreme (that's one big ass gpu btw) on Newegg, 4 out of 40 people ended up with a lemon in a month, one guy is complaining about the fan noise and everyone has something to say about its weight and size.