Originally Posted by Solicitous
My concerns really are that the v3 was released 2 years ago, where as the v5 released this year has faster processor and newer display controller - which I believe allows for partial screen update eg: of the menu, rather than an entire screen refresh when bringing up the menu on the v3.
I have not seen any practical advantage of the Epson (V5) over the Apollo (V3) controller, with the exception of the number of gray levels. This may be because all vendors started out with the Apollo, so they have not taken full advantage of the Epson. As Lo Zeno points out, the Apollo can do partial screen updates (the Epson can in principle do several simultaneously).