I think when it comes to a hardcore game with a strong community, (ARMA, Falcon 4.0, Silent Hunter Series, EQ etc.) its best to go with the best graphics possible. That way the game will have a longer shelf life down the ways. There are a lot of people still playing XCOM because it was such a great game, but all agree it would be excellent to have an overhaul. Just think what this game will be like in 16 months... ACE is out, a few patches to work the bugs out and the ADHD kids have moved back to Counter Strike.
My god, it will be beautiful.