Problem with road racing cranksets is they have that useless huge 52/48 chainring which has no purpose outside of racing, IMO. I can go 35MPH on the middle ring, and there's no need to take a bike faster for commuting or utility. I swap my road racing cranksets for mountain bike triples 44/32/22 that have some real climbing and hauling gears. So, I would not even consider the 50/34 you list because the big ring is too large and the small ring is too large as well.
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-=- '05 Jamis Nova -=- '04 Fuji Absolute -=- '94 Trek 820 -=- '77 Schwinn Scrambler 36/36 -=-
Friends don't let friends use brifters.