who makes best coil over front suspension

You get what you pay for. Bill's front alterkation gets my vote. He is hands down the most friendly people to deal with.

Obviously you haven't dealt with Denny ...not taking anything away from Bill, I have dealt with him in the past with great results and am not in anyway bashing him or his product.... but I have heard of Denny loaning out one of his K frame so you can provide him with input and feedback so he can design exactly what you, the customer wants. Denny's K is also is several hundred dollars less while utilizing all top Quality parts, not to mention the design improvement benefits that were previously mentioned.