You'd think they'd be able to get a better voice for the main guy since, you know, GTA is one of the biggest franchises in gaming history. But I'll happily put up with untold hours of bad accents if the physics are as cool as they're making them look.
I wouldn't worry about that halon; Rockstar has a great track record with PC ports of GTA as far as I'm concerned (I'm still loving the shit out of Vice City and San Andreas on my rig). It'll probably be a little while, but that's because they get it right ARE YOU LISTENING CAPCOM YOU FUCKS
I am as excited as the next guy to play a new GTA; love the series, but....can the people not look like showroom dummies? Seriously...people are not shiny (except in rare circumstances).