Outstanding review! I used to collect diecast and only stopped when I ran out of space. I really like 1:18 although I'm coming around to 1:43. But I'd like to cull my collection some and since I didn't save all of the boxes/packaging I'll take a hit but maybe I can sell some and not get hurt too bad. I tended to collect Porsche, MB and Ferrari with a few odd and ends but don't think I have any BMW's. But there awesome cars and there's a few I'd love. I guess my favorite car is the Pocher 1:8 Porsche 911 which is probably (by far) the most expensive at around $400. but it's an awesome model.
Thanks again for the review - I also liked the details about how you fixed the suspension and other flaws. Great job!