Is Ubercart our solution?

We have been using E-Commerce for about two years now as our cart solution on our non profit web site. We only use it for donations. However, what we have seen in the industry is something more along these lines when it comes to handling a donation process in one place.

https://www.accion.org/SSLPage.aspx?pid=613

We would like to redo the donations page using a system that will allow us to have almost exactly the same features you see in that link. Currently E-Commerce forces too many steps, screens, that are confusing to our average users and it is a problem as people get discouraged to donate as it makes the process very cumbersome.

1. Does Ubercart allow to create a multiple choice form like those commonly found in donation areas with several amounts to choose from plus a custom amount field?
2. Can the donation (product) page also include the billing, credit cards, and shipping fields all in one place?

We are pressed with time for a solution and at the moment are considering a custom donations application if necessary, but I have seen the demos on Ubercart and while I see the checkout screen with all the forms we wish to combine in one place, I need to know if a multiple amount + custom field form combo can be made easily for a donation type product.