Torflex is a much better suspension system than leaf springs. It is a independent suspension. Less wear and tear and less maintenance and a smoother ride. The disadvantage it can only be used with single and tandem axles (not triple)
I would take Torflex over the leaf springs.
2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-7000 lbs.
Dexter Axle Lift 4-9/16" - installed with sub-frame.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power