If you ride at a DIN of 8, P18's are out of the question.
The FKS/P race bindings have a very narrow footprint and have turntable heels, so it seems you would want a set of the P10's, P12's or P14's The rossignol equalivent to those are the Axial 100, Axial 120, and Axial 140.
These will all do, but I would suggest the P12 or Axial 120.
Vertical release is an asset in the park. It does exactly as it says: releases vertically. This is benificial in backward and backward twisting falls, releaving stress on the knees.