Quite frankly, I'm one of those who has been considering it.
Been lurking here for a number of months now, keeping an eye on what I can. (And thank you for this AWESOME website/resource!).
I've been with Sprint for YEARS, and remember when their 3G network was the BEST in the Chicagoland area. But it is a shadow of its former self. And I find myself torn between holding out for another however many months it takes for NV & LTE to go live here vs calling it quits (especially with the SGSIII release).