I would stay on the toll roads if going any reasonable distance in Europe, esp France. I often found when going cross country in RHD all it takes is one tractor and you're buggered unless you trust your co-driver for their OT judgements.
The French B and unclassified roads are fantastic driving, though. Not the potholed disgraces we have in the UK and very little traffic.
Overtaking can be interesting, as you say, but well worth it, IMHO. Quite often you get 2 mile long straights which should be enough to dispatch any thing that's in the way.
Closest I've been to maxing out the Westfield was during a mammoth overtake of about 8 cars and an HGV on such a road. And no, I didn't have a chance to look at the speedo but it hit the rev limiter in 4th.

If you need to cover miles quickly the toll roads are the best bet, though. About the worst choice is the A roads and non-toll motorways where all the tight gits sit in traffic jams.

The Dorgoigne is an excellent area and full of lots of things to see (and drink) they are generally very friendly towards the Brits down there. An qrea known as the Lotte is extremely nice and very very warm in the summer months. Hiring a kayak and floating down the river is very nice, esp with a few tins of cold wife beater. Also Bordeaux is not far from here and well worth a visit along with Toulouse (miss Marseille out)
Seconded.

Now. I have to be in Trieste in mid-may for my cousin's wedding and was about to book some flights.
Easyjet or Omega? Discuss.

Kevin