I would pick one of these based on your love for the music. For me, nothing beats Beethoven #4. Beethoven #3 is also a gem. Based on a non-informed opinion: I would say looking at only 3 on your list:Schuman is easier than Beethoven #3 and Beethoven #4 is the hardest of these 3.
Do you think I am ready for those concerti? Thank you for your quick reply.