Awesome car, and very good work! Makes me happy to see an old E30 like that!
I got the same hobby too. Just got hold of an E30 with just 40000km. Planning Alpina wheels, 2,7 liter M20 engine, Alpina suspension, 325ix LSD and brake upgrade. Thats about it. WIll keep it as original as possible.
Here are some pictures, together with the E21.