new distributor

1973 dart swinger, built 318... looking to upgrade igniton system. have any of you guys done the davis dei distributor set up, clear everything ok? or how about the procomp electronics small self contained ecu inside their distributor. just wanting to upgrade the stock mopar unit..
also mancini racing has come out with a mopar smart orange box 200.00 that is supposed to be far superior... or i can allways go with the good ole msd 6al spark box. any suggestions. does need to vaccum advance for street, running the mp purple 340 cam with 3:55 gears and has a/c....holley/summit 600cfm cab... just fuel for thought..hee hee hee.....
what ya guys/gals think?