Just a quick something to consider. Are you planning on raising and lowering your car often? After putting on new shocks/springs an alignment is recommended because camber is affected. Every time you raise or lower, you affect the geometry of the suspension - at least slightly.

It might be easier to figure out how much you'd like to lower the car and buy the appropriate lowering springs.

By the way, I have noticed that you can typically pick up brand name lowering springs on eBay cheaper than you can if you go to other online aftermarket car sites. But...most of the eBay coilovers are the el-cheapo versions.