SB-900 picked up

Ok, I got the SB-900 in my hands now, for $400. The SB-900 is a significantly larger than the SB-800. I like it that the flash surface is bigger--the larger the surface the smoother the shadows, but I really doubt the surface area increase will make any difference in practice.

Here is an image of the two flashes (source: http://www.nikonsb900.net/compare-vs-sb800/):

SB-900

I am going to pick up an SB-900 tomorrow morning if noone picked it up tonight. It is a second hand flash and that is good enough for me. I wonder if the SB-900 is really any better than the SB-800 though. Power-wise, the SB-800 beats everything else in the Nikon SB series. I like shooting long distance ...