Had an '02 Softail for my first Harley. Test rode both a RK and Heritage. Noticed the whine of the 'B' and just decided I could live with out the shake of the 'A'.
Now I have a '05 EG 103 and the 'A' motor is so annoying. Here's what is supposed to be a smooth ridin' crusin' machine. Everytime you back off the gas for a turn or stoplight, the shaking of the motor returning to idle makes the bike feel like you are riding on marbles or sand. Sure, at 2k rpm and above it is smooth, just like the 'B', but it makes the bike feel so loose.
FLHT line would be so much better if a B motor could be mated to the new 6 speed. The shaking has no place on today's cruisers. Balancers have been around for 20 years.