My wife had a V6 for 9 months of which 3 months was spent with the dealer awaiting on a new engine due to Head Gasket Failure. As far as I have determioned V6's had the same problems as the 1.8's but it was not as well publisised as there was not as many on the road.
Have got an TD4 HSE Auto which I have had since new. It has covered 53500 miles in two and a half years, mostly hard and fast (I like landies because they stand up to abuse) and the only problem I have had is a seized rear diff which blew in spectacular fashion on the M8 in August this year. I have been waiting since the end of July for a Freelander 2 HSe which I am told will be ready next week. After the V6 the the TD4 was the last chance but it proved it's worth.