I went and looked at the job ad on EfC and I genuinely think it's got some merit with repsect to your intended path. Both on a relative basis compared to, errr, nothing (which is what you have right now), and even on an absolute basis. Bear in mind that 'market facing' jobs for people at your level are like hens teeth right now. So not only would I, if I were in your position, keep a VERY open mind about it, I would actually go after it like my life depended on it. At the end of the day if you get offered the job you don't have to take it, but if you kinda slouch in there and wait for them to start polishing your shoes then you'll get nothing.
And a job can be what you make it you know. If they're saying it's a fixed term thing then ask what happens if you come to the end of it and are doing really well. Doesn't hurt to say that you're basically looking for an alpha generating role, but that the job they're offering would be a great insight into the market and that you want to be in a role that has a component of market interaction in it. At the end of the day, if they're saying it's not permament, it's not a crime for you to have a plan at the end of it. I think impress first of all them and then, if you're further along the road, you are in a good position to have an open dialogue with them.
If someone is able to have a mature, honest conversation with me when I'm in their position I think that's a much more marketable person than the one who strides in like they're doing a Kevin and Perry impression (i.e. generic sulky teenager). Which, although that probably isn't you, is kinda how your earlier posts came across, and is therefore at risk of being how your first impression goes at interview. In which case whether you want the job or not is gonna be totally moot. Believe me there's a ton of people out there who would love that job.
My $0.02. Lecture over, I promise.
GJ