Well, with 32:tooth chainring and 18T sprocket you'll have the equivalent of from 32:34 (1st) to 32:9 (11th), or pretty much the same as 42:12 with a triple crankset.
I wouldn't think you'd ever need to gear any higher than that (well, I wouldn't) but going to, say, a 20T sprocket and going lower might be an option.
I was out for a three hour ride with a mate of mine today and at times I must admit that I thought "why am I dragging all this extra weight around?" as 95% of the time I was in 5th gear (ie 1:1).......
Old habits die hard, I suppose