Hi Amy --
I hate to be the voice of semi-dissent, but I'm really on the fence about #1 for the occasion (recruiter interview/law firm position).
I don't know if you're job-hopping vs returning to the workforce, but in this economy you may have more leeway with dress etc if the former. That "known quantity" thing!
So: while I agree you look great in#1 and it would fly no problem in my dressier business casual office -- and probably many law offices -- for an uber-conservative field like law I would want the recruiter to feel s/he could send you straight from the interview to talk to the firm. [Not that this is likely, but you know what I mean.] And I worry #1 might read a hair "flashy."
Personally I would have chosen #3 for safety but as you followed up the fit isn't right in the back...always the way, I swear.
Have you tried swapping in dress #7 for dress #1? I feel as if that might split the difference in terms of safe vs too Not Our Kind, Dear.
I know how nerve-racking this part of interviewing can be (still PTSD from trying to choose the right thing to wear to a summertime SoCal interview for a creative job in a semi-conservative industry...).
Whatever you wear, fingers crossed the conversation opens doors!