You've been mostly-dead all day.
DTT BOTM WINNER
You want lower resistance coils on an electronic ignition like the Dyna. You'll get better spark, better performance and better fuel efficiency. The resistance in the primary windings effects voltage, so you will get more voltage and better spark with the lower resistance coils. That's why most electronic ignitions are lower resistance (1.5 - 3.0 ohms). Points use higher resistance coils (5 ohms) so they last longer, since higher voltage will cause them to burn out quicker.