starting digital art

I've been drawing traditionally so far but now I want to start digital art. But I'm not quite sure what tablet, digital pen would be best to start working with. A device where I can perform ibispaint x, fresco, photoshop at least, I would probably need more storage, smoothness of the screen etc. I can't think of what's more necessities I need from a tablet for drawing. I'm completely noob to this digital, electronic devices, I'd really be thankful for suggestions if you can spare some!