About this time last year I found myself asking the exact same questions - well almost the exact same. This is what I can tell you from my experience:
First of all - my criteria (and please keep in mind that these were what I valued and what I was looking for - they may not be the same for you or anyone else).
1. I wanted a no compromise suspension set up with respect to performance focusing on road racing and open highway competition. I have built many first gen Camaros and have always had to compromise one place or the other and always wound up wondering how much better the car would have performed if I had not given in due to dollars or streetability considerations.
2. I needed a suspension set up that would be functional in multiple disciplines. While my focus was on road racing and open highway events like the Silver State Challenge, the One Lap of America race includes drag racing, road course racing, skid pads, and anything else that Mr. Yates dreams up (including dirt track racing a couple of years ago). Not to mention 5,000 miles of highways between events.
3. I did not want to built this car as a full frame car. Yes, this is contrary to #1. Right or wrong, I wanted to build this as a Camaro - not a race car with a Camaro shell. That being said, the next one will be the other way around.
Armed with those criteria I scoured every message board that I could find, called every contact that I knew and exchanged a ton of emails and phone calls with manufactures across the country. I did make an effort to visit as many manufactures as I could - business took me to SC, I spent an extra day and went to NC - and I looked at what others were doing. (Thanks to Scott and this board there is a ton of experience to tap into if you take the time and initiative).
At that point I felt like you do the day you get back from Sema - completely overloaded with information and ideas. And it took some time, and thought, and consideration of the pro's and con's of everyones products - and nearly all of them have both pro's and con's worth considering.
In the end I chose:
Front - American Touring Specialties. Despite the fact that I was convinced that I wanted (or needed) an aftermarket front subframe, I ultimately came to the conclusion that a modified stock subframe offered the best solution given the alternatives. Geometry won this one.
Rear - Lateral Dynamics. There is simply no better road racing suspension than a 3-link and LD has put together a package for F-bodies that is well engineered, outstandingly fabricated, and simply works.
That being said, Scott's comments earlier are 100% true - particularly with respect to the so called "secondary components" like shock, springs, and tires. I would hazzard to say that these choices are as important, if not more important, than the actual suspension systems. That was one of the other factors that I took into consideration with ATS and Lateral Dynamics - they not only understood this, they preached it.
Anyway, that is my experience and my opinon only. I can go into more detail with respect to the technical aspects of my choices if you're interested but since this post is probably longer than all of my previous posts combined it's time to stop for now.