Help! Stop me from selling rMBP and buying Air

My 2012 15 inch rMBP has a defect that makes the lid slightly uneven with the body. Now I can't stand it anymore and I want to sell it and buy a new Air:

1. Can the Air drive the TBD as fluidly as the rMBP can? (Please say no.)

2. Does 4GB vs 8GB make a difference, especially when the machine has a very fast SSD (like the new airs)?

3. Can the rMBP be considered more future proof than the Air for web surfing/Civ 5/word processing?

 

One of the guys at the Genius Bar (an Apple tech) said that the problem was likely due to the lid being impacted on by something, so Apple can't fix it. He did clean my screen, though.

I mostly use my laptop for web browsing, PDF/ebook reading and word processing.

Maybe sell the MBA? Or keep it if it's satisfying my needs at that point. It seems that the value of my rMBP is roughly equivalent to a new MacBook Air because of the lid issue (and is decreasing as we get closer to the release of the new rMBPs), so I was thinking I might as well try the new Air and ensure that I retain some future value.

I have about two weeks of warranty left.

The lower resolution bothered me when I bought a 2012 Air after moving from a 17 inch MBP, which is when I bought the rMBP. I later bought a TBD, though, so the resolution of the actual machine doesn't matter that much. When I am using the rMBP away from the TBD, I mostly use the 1440 by 900 anyway, because the screen is physically too small for me to be able to use the 1920 by 1080 resolution in a productive way.

LOL

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Awesome! Good to know that the Air (if I get one) won't have any issues running the display.

Apple said it would cost around $700 to fix it