I'd imagine all of them to be honest, I had mine done at Vospers for what I thought was a good price compared to my supplying dealers original quote, then I had a special offer mailshot through from my supplying dealer Wessex a couple of hundred cheaper, think it was 2700 inc VAT and fitting, which isn't bad if you ask me, particularly when they had originally quoted near 4k.
Anywhere near 3k and the kit represents pretty decent value compared to aftermarket to be honest assuming you want all the bits of course, in addition you could get some return on your old parts, if you can be arsed, mine are still in my shed and I binned the old exhaust.