The other day Tomas Restrepo released a new Visual Studio Color Theme called Distant Shores. It is a low-contrast theme with a dark background, and I must admit I am a BIG FAN! Have a look at the following screen shot. BTW - The font I am using is Damien Guard's Envy CodeR font that Tomas Restrepo recommends in his blog posting.
Give it a shot! Your eyes will thank you!