all the GTX 470's & 480's are 2.0 cards so if you can run the GTX 260, you can run the others
for PSU; Antec, Seasonic, Corsair, XFX all sell very good units. BFG and OCZ sell solid units at moderate prices. The exact unit you need would depend on the video card you select.
the case you linked will fit the video cards but why not get an Antec 300 or CM centurion and spend the saved money on a new mobo?