Re: Remap who shall it be?
Well as said, we don't want the thread to descend into "my mappers better than yours".
That said, generally you may want to pick a remapper that has a dyno or "rolling road". Without one of these they will not be able to tweak the map to your car, otherwise known as a "custom map" - that's what you want ideally. All cars differ with age, part wear and even different model years and servicing, that's why results can be different and custom maps are ideal.
If you are not prepared to travel to the remapper's workshop then clearly they won't be able to rolling road your car. I'd say it's worth making the trip though. Without a rolling road they can only give you a "generic map" developed for a general car of your type.
The other thing I'd say is the gains on a turbo diesel can be truly mammoth. The downside of that is that you are bound to get premature clutch wear, but worse than that the car may produce so much torque that over time you tear apart transmission or even engine internals. As such you may be better off asking for a balanced map which improves power, mpgs and turbo smoothness, rather than a "mad map" for all out power.
Price itself can be a red herring as there seems to be a lot of variability - I'd look for people with a rolling road and custom mapping. My car was the first of its kind done by the company I used. They rolling roaded it and did several different maps on it (rolling roading it each time to check the effect), but I was very pleased with the final results.
If a company say they can map for your car in 15 mins, then that's a generic map and I wouldn't say it's perfect, but if you don't want to travel to them you may take the view that a custom map is right for you. If they are coming to your doorstep though, you don't get the pleasure of a long drive home to see the fruits of their labours!
Brat Pack no.8