I would certainly be looking at either a lightweight laptop (or possibly netbook), and depending on the severity of the condition, either a Kindle or an iPad - The beauty of the iPad is that it is light, can read all the ebooks that the Kindle can, but also be used as a notetaker, organiser, etc.
Assessors are keen to recommend new technology when appropriate, the struggle we have is with convincing funding bodies of our recommendations (who may not be so up on new technology) ....that situation is slowly improving though.
If the needs assessment is carried out correctly, you are completely up front and honest with the assessor, and there is strong medical evidence, then I'm sure the assessor can state a strong case.
Best of luck.