And I find it a bit ridiculous that it's seen as such a "prize" to be won (and therefore sought...), but I still found it to be an interesting exercise to think about which locations match the stated requirements. This is the best analysis I've read - most of the other ones are pretty dumb. One correction: Philly is no longer shrinking! But, yes, there are 2-3 locations in Philly which would be ideal, cheapish, and, sadly, the city would probably throw a bunch of money it does not have at them to get it.
I'd still bet money on the DC area - probably Tyson's Corner - for somewhat obvious reasons.