Ordering an A5 3.0 TDI unless you tell me not to!

After having had my A4 1.8T Cab for 3 1/2 years, its time for a change. I drive 73 miles to work every day and was thinking theat an A5 3.0 TDI with ALL the options in it will do it for me. I would have loved to go for an RS4 or S5 but with the miles I put + my current income i would be pushing it a bit. Never had a Diesel before, and for many years said would never have one ( I said would only wanted a cab for a few months to tick the box, and had mine for almost 4 years....) but after what I have been reading, plus a few test drives here and there I think it will exceed my expectations... Any thoughts? Have not placed the order yet, since I am shopping for financing and I am test driving an A5 3.0 TDI on Sat 21st July.