Echo ?
Are you fully aware of the feed back you will get when your ABS engages ?
When you checked them what advise did they gave you to solve the problem ?
Check your rotors,brake pads,tyres,rims and hubs front and back. I am sure the suspension shop you checked would have looked at all your bushings etc... It won't hurt to check them yourself incase they missed something. Oh also check your shock mount.