I bought a 2007 311cdi medium wheel base Sprinter earlier this year and am completely happy with it. It has done just over 200000k's and is great to drive, returns 10L per 100k's fuel economy and the best thing is it is rear wheel drive and you can get to most of the engine without taking too much skin off. Also there are quite a few after market parts suppliers who offer quality replacements.
Can't speak highly enough of them. Even the wife doesn't mind driving it!