I used J-Spec for my first V35 and was very happy with the service.
Criag was extremely helpful and very patient.
I'm the kind of customer that wanted the best value car for my money and i wanted it yesterday :-)
The car came in exactly as described, without a hitch in the whole process.
However, my second V35 I bought locally in Australia. I think you'll find there are a lot of nice bargains about the place if you do a bit of a search. There's a few very nice examples up for sale in teh For Sale section, and the bonus is that you get to test drive the car and have it inspected as much as you like.
At the end of the day, if your going for a very unique colour/combo that you can't find here then import, if your going to save thousands then import, if what you want is local and it's only a grand or so more expensive than importing, then i would stay local :-)
Again i was very very happy with J-Spec, and if needed would use them again, but personally nothing beats paying for a car and driving it home the same day.
Cheers
Bobby