It would probably help him a bit, but no one NEEDs it. No one! You don't need to get a brand new car and you don't need the super size meal. This guy seems to be doing well for himself, and he sures knows more about computers then i did when i was 14, heck i think even now. He's got the money and he has treated himself. We aren't his parents and it's not like you would listen to randoms online telling you to return the hugeass monitors you just bought and put the money somewhere in a box, at least not when I was 14!
Anyway, congrats on the cool new monitors, take lots of screens for us when you do eventually get it (please update first post so we don't have to read more people getting a bit spiffy ^_^.
Although im not a programmer (and read a lot of books at my desk for what i do) so i will be slightly bias, i think one 30" is great, in fact, im planning on getting one myself. But 2 would be a bit weird i think, let me try and explain:
Due to the size and number, you can only really place them in two arrangements that make sense unless you have some circular desk or eyes that are 30cm apart/like to shift your chair across the desk like you'd have to do with this
- unless your desk was really deep (depth).
1 - One of them head on and the other next to it at an angle towards you, like this guy:
http://www.youtube.com/watch?v=wnUSMU63sgs
-which looks kind of lame if you ask me - not quite right you know? and if you are spending that much cash, lets get a workplace that gives some eyecandy

or
2 - both of them at an angle, you sitting in the centre, like this:
Neither of which is quite perfect! I think either 1x30", or 1x30" with two smaller monitors rotated to be vertical and placed along side it, OR going all out and immersing yourself with monitors 3x30" which i feel is a bit much....
what do you think? (this is really more to help me decide, then for you

)