Piper is expensive, but it's the price you pay for using someone with the outstanding rep that his shop has. Go to any club racing event in the mid-atlantic and see the % of cars running Piper roll bars/cages and ask around. I'll be using him again for any future work regardless of cost.

Not saying the other guys mentioned in this thread aren't up for the task, I just don't know anything about their work, but I can recommend Piper without any hesitation.