Having built and dynoed quite a few stock and highly modded B20's I can only say that those 'super ignition systems' don't offer any power increase over a stock system that is functioning correctly.

Instead of spending the money on such systems it is much more beneficial to have your distributer rebuilt and converted to a breakerless system (like the last B20's had, or an optical system like the lumenition). A worn distributer will cause power loss and can eventually kill your engine. Switching to breakerless ignition will not boost power but make the thing more reliable and avoid the problem you have with points: floating at +6500 rpm.

I am NOT saying systems like Crane and MSD are not good, in certain applications they definately are beneficial, like turbo engines running astronomical boost pressures where a traditionnal spark isn't powerfull enough to jump the gap or very high rpm engines (+10000 rpm)

Best regards

Stefan