There's an 11 oz whipcord in one of the books-- a medium-firm twill, sort of a relaxed gabardine. You normally see it in grey or tan, but there is at least one maker (Holland & Sherry? Minnis?) who has olive and slate blue in the lineup.
Some time back, Carl from CEGO gave a pretty nasty review to most of Acorn's lines. I don't know if he was speaking more about feel under the hand (or machine), or if there was some objective history with wear or shrinkage. Either way, if justified, it is a shame, because their colors and styles are very classic.
Mirage is a very good sport jacket material for spring or cool summer wear. Obviously not ideal for the office, but not very flashy either, and it tailors beautifully. I have one of the blue herringbones, and I like it a lot.Steven Hitchcock put some of the Sunbeam on his blog not too long ago. You'd have to want a bright color, but it has promise.