Currently there is a Group buy going on over at 88hybrid for Colt cams. I am getting a set myself.
Here is a link for the Specs available.
http://www.xenonz31.com/camspecs.html
As for springs, I am going to go with schnider springs. They are about $100 for the set.
As for the heads, Please take a look at this link.
http://www.xenonz31.com/Wseriesmain.html