New 27" LED Cinema Display, connected to the 15" MBP, using both displays as one big desktop. It is absolutely gorgeous: 2560x1440 razor-sharp, rock solid pixels.
It's a replacement for a 12 year old Samsung SyncMaster 240T which was getting too dim to see. The difference is wonderful!
I have a friend that has like 10 monitors in his office at home. All big ones like that. Very envious of him. But I tend to like saving up money sometimes.