I think a 200watt PSU would probably run all of your proposed A4000 plus cards and devices, but I think I would get a 300watt to 400watt PSU just in case.
By the way, what is a Peggy+ that you have listed in your signature?
Also, how do you like the VLab Motion and Toccata sound card combination? I have a VLab Motion & Toccata set up for my A2000, but have not used it yet.