HO scale vehicles

[torikoos]

Another you might want to consider is Monogram (I have recently managed to get a few via evilbay, another reasonable source, although you end up bidding against collectors..)which are quite decent, but often have their head lights cast in the same plastic color as the rest of the car body (at least for the couple I just got), which I've never seen on an Atlas, let alone a Busch, but I'm not familiar with Model Power (don't own any).
The Busch, Herpa, Praline, Trident,Wiking and some other brands are often very detailed, although the older lines of Wiking are quite basic, and very european biased (As is the case with Busch and Herpa too, they're german brands after all).
Trident has an emphasis on military models, many WW2 era, but have some great looking Chevy Van/Sport Van in their range. Many are official cars (police etc), but there are several 'normal' versions too.
The time frame you mention is under represented at present, for the 70's to early '90's you'll almost certainly have to look at the 2nd hand market. New models being produced are often either current model years, or the 50's (which is of course a hugely popular era to model).

Koos