Wouldn't think it will affect the price tag on the game. Anyways, even though they're not on the same level of fame (I guess) MrSmileyFaceDude (a dev) posted a while back on the Bethsoft forums that Patrick Stewart wasn't all that expensive to hire for Oblivion, even though people obviously like to make cracks about it. Anyways, time will tell if the scrip is any good. Both Patrick Stewart and Sean Bean are excellent actors, but with an uninteresting script, there's not much to do with it really. Not to mention that voiceacting is rather different than 'normal' acting.