Ok, what's the deal w/ these? I see where the msd digital e-curve units are selling for like $330 on ebay new, it says they are a stand alone unit and can dial in all kinds of curves, set a rpm limit all w/o using a 6al box. This sounds nice but do they really do the job of a normal msd dizzy hooked up to a 6al box. Which would give a better spark? If the e-curve really is all that it might be nice not having to mount a box as well. This would be in a street car application. Just trying to decide which route to take. I would also upgrade the coil as well to the blaster most likely. Thanks for any input.