I would go for the new cones, then you can give US feedback!

Seriously, you know what regular cones are like, right?
The smooth a rides will start out high, but will settle down, and you'll wind up raising the car up again or leaving it in the down position it settles to.
Jeremy at Jet Motors says to take 2mm off the high low (close to the grease nipple) and an equal amount off the inside of the high low thread - what I did was chop off the part where the circlip fits, then grind the end smooth and at a 45* angle to re-establish the threads.