I am a little biased because I am having a positive experienced with accutane.
I have mild acne (probably milder than you described) and am on a low dose of 20mg a day. My acne is persistent (began around age 8, I'm 23 now) and has not responded to any other treatment. This is why my derm thought I was a good candidate for a low dose.
I am having nothing but positive results. No side effects whatsoever. My skin is no longer oily, which is a total miracle, but I still have a little while to go until I am completely clear. I am very happy with the results so far.
Give your current meds a try, if there's no improvement ask you derm again about accutane. If he says no, get another opinion. I have know MANY people who have taken accutane, none on such a low dosage as mine, and have absolutely nothing but positive things to say about it.
I didn't rush into accutane, I considered it for about a year. And I am extremely happy with my decision. The people with problems and terrible side effects are usually the ones on much higher dosages I've noticed.