I've seen Boogie Nights.
Well like I said it was that and Mystery Alaska that really influenced me. In his later work from that Boogie period forward his voice seems to have deepened considerably and it tends to lend him a greater gravity. Whoever would be cast as Vaughn I think would have to have a fairly deep voice. On many levels Sean Connery isn't a terrible choice but the man seems in rl to be such an asshat that personally I wouldn't want him anywhere near a Trek project. My first runner up is probably James Brolin.