Changing from 9-5 Aero to...........9-5 diesel ?

[addsvrs]

So something i have been putting off thinking about for awhile.
I have a 9-5 Aero estate, absolutely love it, my mobile office, fast enough, well specced etc etc but....

I am self employed buying and selling on Ebay. When i bought this car Aug 2013, my main 2 suppliers were local, my mileage was low, compared to the other cars i looked at (5 series tourer / E class) this seemed a bargain. And it has been, probably the best car i have ever owned. Now for the 'small' problem.
My 2 local suppliers have become unreliable / putting prices up etc so i have been finding myself going further afield to find stock and while i can get low 30's on a run I am starting to think a diesel will suit my situation better.

So what to replace it with. Well it has to be another 9-5 estate but a diesel ( i think a lower powered petrol will be even more depressing) so my questions are basically around which diesel engine is best ? I like the look of the 3.0 one but cant believe mpg will be much better, the 2.2 one, is that a Vauxhall ?

Any other suggestions more than welcome, btw I cant drive any slower lol, LPG is a option, load space similar to the 9-5 is essential.

Thanks

[addsvrs]

That bad ! oh dear

[addsvrs]

Thanks for taking the time to post that, very helpful. I listed my car last night, going to test drive a 2.2 tomorrow so we will see how that goes. Is Vector the top spec for diesels ?