magavolt,
This won't help your situation, but it may make you feel a little better about the difficulty you're having maneuvering the bike. That "700 lb." bike is actually a 900 lb. bike. From H-D specifications: Dry Weight 864.0 lbs. Running Order 901.0 lbs.
The front end lowering kit from H-D is a reasonably acceptable alternative, although the aftermarket offers better performance at an admittedly higher price. I wouldn't recommend the H-D kit for the rear. That is the same shorter air shock that came stock on the SEEG's, and it has very little travel and almost zero damping. You would be better off with an aftermarket lowering kit that moves the lower shock attachment (using the stock shocks) if you want the least expensive alternative. If you don't mind losing the air adjustability, conventional shocks from Progressive Suspension have proven to be a popular alternative. A 12" shock would lower the rear approximately .75" - 1.0". Of course, if money is no object you may want to look at some of the infinitely adjustable air shocks like the Legends. There are folks here with several different solutions on their bikes, so you should be able to get good feedback once you narrow down what you're looking for.
Jerry