Powder-based printers support color from texture files, but the machines and the printing materials are very expensive (the prints are also heavier and pretty fragile). Plastic-based printers and materials are usually much much cheaper in comparison, but will only print using whatever color of filament you have loaded into…
$500+ for prebuilt ones and close to that for building your own. http://store.solidoodle.com/index.php?route=product/category&path=59 Modeling verification and set up a print isn't too bad from what I've heard, it's better than it use to be