Once again... and to be perfectly clear.

The Dawn Reflex Active Suspension system has BOTH Down Force and Up Force.  The Reflex, and the RFX are ROW-BY-ROW or sectional, it is the operators choice.  In addition, integral accumulators on both sides even further damp oscillations, greatly improving ride on the row unit. 

The Reflex valve also has a reaction speed of 6mS, vs the 200-250 mS response of the traditional proportional valve.

The Dawn Reflex is much faster, requires substantially less hydraulic power, substantially less electric power, allows for better row unit ride, and seamlessly interfaces with GFX automated Hydraulic Row Cleaners, CFX Automated Hydraulic fertilizer openers, Dawn's ADC (active depth control) , and the new Dawn Hydraulic closing system, with integral seed firming wheel.

As far as cost, the Reflex is essentially the same price other systems, with far greater capability.

The JD factory RFX option is the lowest cost hydraulic downforce you can buy on a new planter.  But all of this is easy to discover, and we are happy to share pricing information.

You can see the Reflex here

http://dawnequipment.com/Dawn_Reflex.html