There's no way I can say this without sounding conceited, so I won't even try.

You shouldn't be filled with horror at the prospect of a 2ii because it's pretty much completely irrelevant - the number of jobs that actually care can be counted on one hand, and most of those won't even care once you've a year or two's work experience. In any case, three years after graduation you trade up to an (unclassified) MA, making the BA class irrelevant.