Most of the OTR Class 8 rigs now days are air ride, many front and rear axles, as are a large percentage of trailers..
My '05 KW had 8 bag air suspension on the drives and could have been ordered w/the 4 bag system called "air leaf" I have owned 6 Class 8's over a 30 year span and all were Peterbilt conventionals with air leaf except for my last rig an '05 KW W900. Only way to fly!
A fully sprung suspension on an OTR Class 8 today would be a rarity IMHO.
If you want a truck, buy a truck and not a pick-up. I believe the Rams have air suspension as an option now also. But my '15 3500 Ram has the springs & I'm a happy camper w/it, rides just fine when empty also.
Cheers and good luck w/whatever you decide.
