I think the 128gb models will sell out pretty fast, more people seem to be climbing the $100 upgrade ladder to the top. Each step up I say it's only another $100, then the jump from 64 to 128 for $100 is just too tempting to ignore
My opinion is you either get the 32gb or the 128gb. 16gb is too small to be useful. Regarding the 64gb you may as well pay the extra for an additional 64gb with the 128gb
Wait till this afternoon and I bet 128gb won't be the most popular. We are the enthusiast that wait up/wake-up early and then go to a board to discuss. Later today it will better reflect the general consumer.
FYI- I ordered 128gb AT&T (grandfathered unlimited,) leather case & applecare. My company receives a discount so I paid 55 dollars more than the 64gb factoring the stacked discounts. Applecare was 81 dollars, case was 7 dollars off. Going to sell my iPad 3.
Managed OK with 64 GB on my iPad 3, but apps are only going to get bigger as they move to 64-bit, so went 128 GB this time. The extra £80 for another 64 GB is quite good value. I just which the 16 GB bottom tier had been dropped.
My 32gb is no where near 32gb so although I thought about 128gb, I went for 64gb. Plus there is a mental barrier near $1k where I'd start to think I should skip the iPad and get a MBA.
I keep all of my music on my iPhone, so I will probably go with the 16 or 32 GB iPad. I keep my family photos on a home server (PhotoStreamr), so they don't take up any space on my iPad. The only thing left is movies, and for those I generally add a few when preparing for a trip, and then delete them after I watch.