I can comment on the aluminum Quick series - I own a Quick 1 and rode multiple of the lower level Quicks. I think they are worth considering. The lower lever (higher numbers) have a more relaxed riding position than the Quick 1-4. I lucked into the Quick 1 Disc when a friend upgraded to a CF Specialized Roubaix and it is fast, light, and is very comfortable to ride. Best upgrade was switching from 700x30 to 700x35 tires to make rides on rough pavement more comfortable.