What ignition system will do me justice??

I have the Mallory 685 ignition box on my duster. Its similar to the msd Digital6 but lots cheaper to buy. It has the multispark, rev limiter, start retard, switchable retard ( which is really nice for nitrous users. I am running a 150 shot so I need to pull 6 degrees of timing out when I'm spraying. My ignition box is wired so that when I arm the nitrous system, the ignition box pulls the timing back 6 degrees. No accidental boom), a low speed rev limiter for the starting line, etc. All in all a very nice piece. By the way, if you have a big cam, the multispark DOES give you a noticable better idle quality and cleaner low speed operation.