There are not a whole hell of a lot of vendors to choose from these days but TA seems to make some pretty good stuff. I don't see anyone else making new stage blocks in aluminum. There heads are awesome too so I cant see how you could go wrong with a set of their headers.
Try posting under "Parts wanted" and im sure someone will have a set to sell you unless you want new.
Nick Micale could probably give you some better info on their pros and cons. You can reach him here arizonagn@earthlink.net
Those headers was never meant to be a race header, just a stock replacement. They are not for stage II with race head, but I would say that ta will tell you what you want to hear.