How are you proportioned; longer legs than trunk or vice versa? Different brands of frames, like different brands of jeans for instance, are proportioned differently. Out of several of the brands you mention, Colnago has the shortest top tubes (good if you are long legs/short trunk) and Trek runs somewhat longer.
From what I can tell looking at these frames over the last few years, Colnago will have the best finish quality with Trek right behind, Pinarello lets the scariest looking aluminum welds out into the world, and there seem to be the most happy owners of steel Bianchis and carbon Treks.