I was looking at the list and thinking the same thing. I definitely wouldn't choose the Asbestos Firestarter.
If I had to choose just one book it would be either The Stand (super rare LETTERED coffin edition not the S/L).
Or
The Centipede Press deluxe "Owner's copy" of Salem's Lot that Jerad Walters made for himself. It was even more luxurious in design than the regular Roman-Numeraled edition and was strictly the only copy made. See the attached link below...
http://www.thedarktower.org/palaver/...ions-for-sale!
For a collection, I would probably think that a complete matching S/L set of The Dark Tower vols. I - VII, numbered #19 and each remarqued by Michael Whelan, would be the most coveted item ever.