Malory - I know exactly how you feel with the lines and circles dilemma. For me it's no contest, covering the circles is always my priority. The lines aren't too bad (yet!) and as I'm almost 48 I feel that a few lines are somewhat acceptable, the circles though just make me look tired and ill and I'm very self-conscious of them. Sorry, not much help, I've not found any concealer yet that doesn't settle into my lines and I've just learnt to compromise and deal with the problem I dislike the most.
3b in South Australia.