I filled out all the info on their site. Do y'all think we can get a 'group buy' here? 
I'm still trying to figure out the best option for me. If these units hold 70% of their value after 5-6 years it makes sense to purchase new. And I really like Ultrafxr's paint! I just have not been able to tell the difference between the Quantum and Turbo+ besides pricing and minor styling changes.
I bought a Quantum a few weeks ago. I have taken two trips of about 1000 miles each with it since buying it. I can honestly say that I am completely happy with the purchase. It tows great - you literally don't know it is back there. I loose about 2mpg when towing. I used to have to strap and bungy luggage all over my tourpak and stuff my saddlebags and tour pak to the brim - and now I have tons of room available without loading anything onto my bike. My wife now can take more "stuff" which has made her happy...
The basic differences between the Quantum and Turbo are just about what you said - price - minor styling - slightly more storage space. Kind of personal preference...
I chose to buy the diamond black color rather then custom paint to match my bike - I don't seem to keep a bike more then 2 or three years - and I expect to have the trailer a lot longer then that. That kind of left white and black as options - and it wasn't going to be white!!
The harness comes with the trailer (included in the price), and the hitch is extra. i also purchased a cover, spare wheel bearing and spare tire and wheel. It is completely simple to mount the hitch and wire the harness. JPcycles offers an adapter plug that makes it real easy to wire.
Nothing but thumbs up from me....
Scott