That's a lot of money to have that done, can get it a lot cheaper than that.
I use a company called injectortune, they offer the before and after aswell, service them with all new filters and seals (send your old ones back to you with the injectors too) all for £12.50 per injector, plus £6 postage.
So £56 all in, an usually a good turn around of roughly 3-4 days from when you send them.
They've done a few sets for me now. They're also traders on a couple of the Saxo and 106 forums, seem to be quite popular.