[Bmod986]

Well what kind of suspension do you want? Do you want a full on race suspension or a comfortable ride? Any way you go its not going to be cheap. The most basic coilover set that is worth looking at start at $2,000+. Also how much weight will the car gain with the added batteries and generator. You may want to make a custom set of springs and shocks to accommodate to your needs. But if you need to get some leads most of the people on the forum suggest going with the stock euro M30ROW suspension or the bilsteins PSS9 coilover kit. Stock suspension kit is around 1,100 plus shiping, and bilsteins are around $2,200. So those are some numbers. Hope that helps.

This doesn't include the control arms and other suspension components that have a huge range in price difference between stock and fully race ready parts.

FCP and Pelican parts are two good places to look for parts.