Anyone have any ideas as to which of these give me the best career prospects?
I know i want an environmental career or a career in neuroscience but having a good joint honours degree and work experience i'm eligible to apply for a huge range and its very confusing. Finding work with an undergrad degree has been tough, i want a more 'vocational' qualification this time, a specialist qualification that will give me entry to a niche market (as opposed to a booming market that might as quickly run out of jobs). I'm not sure if i want to be in academia or not.
Opinions on the jobs opportunities?

Environmental Hazards and Geographical Information Systems Msc
Cognitive Neuroscience
Ornithology
Toxicology
Quartenary Science (climatic change over last 2.5MA years)
Psychological Research Methods

Any ideas how i can decide without trying them all?