And the winner is....
....M364 Fundamentals of Interaction Design
I have finally weeded through the varied options available, read and re-read the reviews till I am blue and purple in the face, and made the all-important decision of "What next?".
The reviews were all positive, although there seems to be a high emphasis on essay-writing and remembering facts, I think the psychological aspects of the course (why is a good design a good design, what makes users read a website in a certain way etc) sound interesting. In addition, I think the reading based course might actually allow a little more combination with personal hygiene (yes I study in the bath...) and thus do my sanity good. Some reviews have even suggested that it's easier than some other Level 3 courses. (But that may well depend on perspective so I won't take that as a certainty in my case)
I believe that I may then go to the Level 1 compulsory course after that to finish off the 'main' part of my degree, leaving just two more Level 3 ones for the Honours part, having also had a little while for more of the new Level 3 courses to rear their heads and give me choices aplenty.