I've been getting the final few bits for MIB and ordered this dash panel from Germany.  It replaces a couple of the cold air vents and just looks way better than those plastic dash top pods. Alpina did do a period correct pod but they're pretty rare and only fit LHD cars.   Anyway, as I already have a Stack oil pressure gauge, I figured a water temp' gauge and an ammeter would complete the trio. They may not be the cheapest gauges out there but the quality is just first rate. I think the finished panel will give the e21 dash the lift it needs, without looking too fussy or over the top. Best of all though, I can keep a closer eye on what's going on with the engine. 
 
 
 
Below the gauges I'm fitting a pre facelift AC spec' centre console to house my Nakamichi head unit.  I like the simple and subtle design.
 
Prototipo 3 spoke steering wheel and the Recaros will finish things off. 
 
 
Am currently looking at carpet types and colours. 
Does anyone have a supplier for Dynamat that isn't too expensive?
One last question.  Personally I like a very slightly nose down stance and staggered rim/tyre combo's.  I'm not talking 70's drag cars but probably a 35mm difference between front and rear.  Are stock e21 totally level or not?  Wondered what other people prefer also?