Has anyone seen a comparo between the four major diesel offerings, i.e. VW/MB/Audi and BMW? I am really interested in the new '11 T-egg TDi and wondered if any comparison had been done between the Audi Q7TDi, ML/GL 320 CDi and the BMW X5D? Don't have an oil burner now but back in the day had a 180D and a Olds 4.3 (cut off 350) that surprisingly was a very good car with decent performance and no problems while I owned it. Like to get back in the fold as the new engines look very interesting.