Jay can't answer the question your posing, although from reading these posts I can tell you that from what I hear BoA is nice to those who treat their secured card well.
Regarding the AU - FICO is supposedly changing their scoring rules in which you'd get no credit as an AU. Last I heard this was supposed to be in effect Spring of this year - I don't think its happened yet... But once it does, it'll be pointless to ahve you as an AU.
Might be best to get in as an AU ASAP, get your scores fixed and ap for your own cards immediatly.