Man 105 stuff is great stuff! the new 10 speed set up for 105 is just awsome. I have 9speed and they are solid performers as said. as for the frame Al or CF its up to you. just because its CF doesnt mean its better then AL. it is really in the bikes feel under you. some frames flex more then others and some riders like more or less flex,....yada yadayada...the piont, 105 is a wise invesment on a good frame.