Thanks for the "real world" experience. After reading your post, viewing, your site, and today actually handling an H2, the only thing left is for me is to rent one for about a week. I have to admit though I think I'm pretty much a "done deal" for the H2 with a P20 or 25 ( wish I could go bigger but budget constraints). Like yourself I am largely Portrait but also Fashion. Do you see a large advantage to the P25 over the P20?
P25 is the perfect back for the H2. What you see is what you get and the extra pixels are really worth having. I'd leave the P20 well alone. Make sure you can get a +back if you are buying new because the standard P25 is nearly 3 years old and the extra stop would be worth having.
Enjoy the system.