You can rebuild, refurbish, and upgrade the entire front AND back suspension for about half of what it would take to get just the basics for an aftermarket front suspension.
I seem to recall that I once priced out an AlterK once I had all the items i wanted, it came in around $3500. Now, that isn't to say that the AlterK is a bad piece, it isn't. It is an awesome set up. It is just overkill for what 95% of us will ever use it for. The cost per pound of weight reduction it provides can be found elsewere on the car for less $$. Coil overs are great if you are a racer and need to quickly and easily change spring rates, but otherwise torsion bars accomplish the same thing for a 1/4 ofthe cost.