I have been doing research for suspension upgrades and found a company called Leda which sells height adjustable and custom dampened/sprung coil overs built to order for $840 w/o shipping. they told me $240 up front and $180 out back.i was wondering if these are a good upgrade or...the thought of having a ride heigh adjustable custom suspension for a little more than a IPD sprung Koni or Bilstein suspension seems like a great idea. what do you all think?