Agreed that early 90's Diamond Back were a bit of a sleeper brand over here for some reason. You can also add Trek to that category though I think.
The '91-'92 ranges for both brands were really capable bikes in my opinion, especially the upper end DB bikes and the 9* series lugged steel Trek. I still wouldn't mind a 1991 DB Axis Team or the black/pink Trek 990 of the same year