Hero is a very nice phone and imho, runs circles around the Pre, which I owned for a while. If you didn't mind your iphone's VKB, then the Hero's KB will feel just fine to you.
Customizing the Hero is ultra easy and flexable and having multiple screens to create scenes is awesome to work with. For instance I have my main scene, a work related scene, a weekend scene, one for my son and games, one for system utilities, etc. I know that for the Pre the whole draw was being able to multi-task. Even though Hero doesn't utilize "cards", you can still easily multi-task and flip between msg'ing, email, internet, etc. Also, there are thousands of apps on the market (in case you are an app-a-holic like many of us).
Of course the choice is up to you, but I think you might like the hero...