Oh, if you have a 360 I'd buy the games and play them. If you're interested in the series and lore, it'd be a shame if you skip them simply because they don't look as good as the PC versions...
Well DA1 on consoles is inferior from gameplay to graphics. DA2 on the other hand is clearly a console game so he wouldn't miss anything there...problem is the game isn't worth the time it takes to play it imo.