A little confused. You want to buy 1 and only 1 road bike that should last to replace your old heavy aluminum bike and your list of bikes are heavy aluminum road bikes with entry level components?
If your on a budget and want to get the best bike for your money I would consider looking at other possible brands, last years models, or even 2014 NEW stock. I would even look at something lightly used as guys buy bikes all the time spend $2-3k ride for 500 miles and let them sit in the garage. I'm cheap as cheap can be, but if you take your time and look around you can find a MUCH better bike for $1500 or less especially if you consider something slightly used. I got the below for $1500 NEW and hands down it's a much better bike with full Ultegra components that will probably last me a lifetime or at least until I can find the next good deal.
