I have no experiance with CSRP but I have with SSBC and Wilwood.
In my opinion Wilwood makes some of the best braking components, period. They function as well as the look and have never disappointed me except when it comes to the cost. They seems to be top of the game in quality, performance and cost.
SSBC also makes a very solid product. We used their brakes on a 66' coupe that we built about 3 years ago. They fit great, looked good and worked perfectly. I personally like the styling ques of the Wilwood parts better but they both function equally as well as far as I'm concerned.
You may also want to look at Master Power brakes, I've used them on several street rod projects as well with great results.
I've been perusing the CSRP website and it looks like they offer a very complete kit but all of the options on the website get a little confusing for me. It may be worth a call over to them to see exactly what they would spec out for your car. I would also be sure to ask if the are using 100% new parts or rebuilt parts. I've seen several brake kits that use newer style mustang calipers and they typically use rebuilt calipers to keep the cost down vs new calipers.