I'm a BMW diesel fan myself having had the excellent e90 320d with powerkit for 3 years and mind you, that's the longest time I've owned a car. Not being braggy but this is my biggest weakness and an expensive one at that. So, I try to balance that passion with some practicality for example, getting a pre owned unit than new.
But in due honesty, I find this 328i engine a joy to drive. It's torquey enough and very Rev happy. Also, for the price difference between the 320d and 328i GT, the 328i offers between value in terms of specs and features.
Will PM you if I get a good offer. As it is, my salesman is giving me 30k rebate with 5 year bsri for the 328i GT with 1k km on the clock