I vote for the Roadglide also,If its a 08 are later with the 96" motor.I really liked mine until I could'nt get the thought of a rock getting in the belt and breaking it. So I traded it for a new Goldwing and hav'nt looked back. If your going to make some longer trips (2000 miles or more) The roadglide or the Wing will do just fine as will the BMW. Dealer's are more abundant with the Harley and Honda. The Wing is heavier than the Roadglide,but is just as easy to get up off the ground and once you start moving,the Wing feels alot lighter than the glide.
In the power and handling department the Wing wins very easily with the BMW coming in 2nd,and the wing use's regular gas,the Harley use's premium.
Comfort,the Wing wins hands down again,with he Glide a fairly close second.The BMW and the Glide will burn you up in slow traffic,and the Wing will get you warm.
The BMW will do 150K miles without any problems and the Wing will do 200 K easily with proper maintnance. The Harley will do 50 to 100 K.
Maintenance on the Wing is 4 quarts and a filter at 8000 miles,the Harley is 6 quarts and a filter every 5 K. Both can be changed by yourself.
Prices, All used one's are about the same for a 02 around 10 to 12 K It will be harder to find a low milage Wing or BMW because they tend to be rode more than the Glide.
If you're looking for something in the 6 to 10 K range in price,The 1500 Wing and BMW would be a good choice.
If you like passing power,consider the 96" Glide only in the Harley,the 88's and 80's don't have enough for me.
Pulling trailer,The wing is No.1 with Harley No. 2
Gas milage,Wing no.1 will use reg.gas and 42 mpg,Glide 44mpg and premium,and the BMW at 45 mpg and premium ( I'm not sure about the BMW)
The Wing works for me,but the Harley has more character,and the Beemer is somewhere in between. The Wings (1800's) have a reverse,and some 1500 wing also have one.
Hope this helps and maybe we'll see each other on the road sometimes. Digger