I have both Trail Air and Center Point and really love them, I watch my fiver while I'm towing it float down the road and I believe that that cushioning of air reduces the wear-and-tear on my fiver,it's components and contents increasing the life span of my rig. If you go this route I strongly suggest you make a cover for the Trail air(simply a bag that sleeves over the pin-box with a bungee chord around the opening sorta' like a long sack)to keep the sun off the air spring much like you cover your tires.
Good Luck!
Red Green:
Remember, I'm pulling for ya. We're
all in this together