Well, let's be honest, no one really NEEDS most things (as in absolutely must have OR ELSE...) when it comes to crafting, we just feel like we do!
I'm surprised you haven't heard about SU's new version of their classic pads.
Just go on YouTube and search for SU new firm foam pads and you'll see a bunch of videos about these pads. Here's one:
New SU ink pads - YouTube