If you want something now, go with the Sprint HTC EVO 3D or Sprint Motorola Photon 4G. I would go with the Sprint HTC EVO 3D, and I did, because of the hardware specifications and because the bootloader has already been unlocked by the development community.
If you can wait until September, then you can do a comparison of those two handsets with the Samsung Galaxy S2. That handset has quite a potent chipset as well, but it does sport a lower resolution than the Sprint HTC EVO 3D at WVGA versus qHD.
Nokia 638 > Motorola Talkabout > Motorola V60t > Motorola V60i > Motorola V505 > Samsung Epix > HTC Hero
& Barnes & Noble Nook Color
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