i agree quintana is the best as a climber , followed by duarte. nobody speaks about beltran, born 1990. he is a very strong climber and has progressed a lot in the last 3 years. i think that in colorado with steeper hills he would have astonished everybody.
quintana is also a better rouleur, so more suited for GC in GT.
probably he will be the first colombian to compete for the win in a GT, since uran and henao are with sky that has particular logic in choosing protected riders and duarte is not in a PT team and i am a little concerned about his recovery in a 3 week long race.
we will see if they will be able to break out
i think you are underrating betancourt, which was very impressive as a climber in giro bio and he confirmed his skills in finestre and emilia. he is very lazy and consequentl very variable in performance.i think he is underrated because he has an atypical structure for a colombian climber, with very big legs, very muscled, more similar to a sprinter. next year he will probably be at liquigas, so we will see-