I'm cross shopping 480 and 1080. I want to move to single card. Don't forget that 480 @ $200 w/ roughly 390x performance will be a great stopgap card until the actual high end 16nm cards drop with Vega and GP102. Probably not many buyers know enough to take this approach, but anyone on this forum could. It would let me sell out my 290s while miners are still buying them up for a good price but keep similar single card performance for not a ton of cash.
But at the same time I'm considering 1080/1070 because it would boil my 290CF performance into a single consistent card. The problem is how pricey it would be, and i'll certainly be tempted to upgrade when big 16nm hits.
I doubt that would really count as cross shopping.