when Vader rised i felt kind of like swithcing off those big red interruptors on his chest! ... make them put you a lid on them dammit!... and now we are on it both you and grievous substitute your lungs for atificial ones! you both already lost more than 70%of your body!... dont have nothing to loose except the asthma!...

And on episode 4 luke looks like on its early 30s so vader would be on its late 50s... kinda old face beneath the mask(more than what episode 6 reveals...)

in the voice department i have yet to hear it on original english but this time i suspect they screwed it on the spanish version... with the 3 original we had a really good vader voice actor.... better than the original methinks (even when if you knew its face it was really funnny picturing him beneath the mask) but this time...