All good thoughts, thanks everyone. At this point I am leaning towards adding a second bike (not in a huge rush) vs changing the setup on my current bike while I continue to work at increasing speed and endurance w/ my current bike. I'm leaning towards a 105 semi-compact w/ and 28mm tires for some comfort and rim brakes for ease of maintenance, either aluminum or carbon. Other than CAAD13, is there anything else I should consider in the under $3K range (best if $1500-$2500) that would be alum or carbon and good quality/value? Am I crazy for wanting rim brakes (lighter, cheaper, and easier maintenance), semi-compact rather than compact, and 28mm vs 25mm or does that sound like a good setup?