For what it's worth, I've been using the HTC Evo 4G from Sprint - both for business and personal use.
I absolutely love the phone and Android. # of apps continues to grow.
Most of the major reviews between the HTC Evo and the iPhone have given the nod to the HTC Evo. I've owned a smartphone since 2001 and have never been happier with a smartphone than I am with this one.