I'm sorry but this makes no sense. You're willing to chance getting a refurb iPad with a potentially bad screen to not have a dinged back shell? Many of the refurb iPads get returned originally due to customer dissatisfaction with dead pixels or light bleed. If apple deems the problem within their acceptable allowance of imperfection then they will simply recondition the back shell and sell as refurb. Surely you would rather have an iPad you are pleased with the screen on than risk getting a worse screen for a fresh back shell?
I also like to keep my belongings in great condition, but once the blemishes have happened I find that Im often relax over time and enjoy the product more. I certainly enjoy driving my 97 truck vs my wife's 2011 SUV because I can park next to any door dinging ***** I want within out fretting the whole time I shop (so far one year we've had it and not a single ding or scratch).
Consider this. Don't go crazy about dings. There will be some as long as you use it. Don't want dings and scratch? Put it the box and put it away. That's only way.