Also, IMO, a big plus with the 8900, it has a lot more memory in which you can load programs. The 9000 has more total memory, but most of that is only for storage of music, pics, etc.
I have a lot
of apps on my 8900!
I store all my books, bibles, music, pics, etc on a 16g micro sd card.
So, it basically depends on how you will use the phone. I personally would rather have more apps than I would 3G.