Gota recommend a 306 hdi estate, you get all the extras as standard on them too, rear discs, air con, leather, and there cheap aswell.
The hdi engines in general are SOLID AS ROCK, we have vans at work on 150000miles with no major probs from new
My 206hdi has been chipped and now running just over 130bhp, a similar re map would give you the same gains for about 250quid