I havent read everything here re Ultegra vs 105.
Basically newest 105 is the older Ultegra... so make what you want of it.
I wanted to buy aluminuim but got a sweet deal on a supersix evo (2016) and i LOVE IT. It's ultegra and it hasn't failed me.
CAAD frame normally is same geometry as the supersix, only big difference is alu vs carbon. If you're "serious" about biking and will keep riding, 105 will get you in the game and keep you in there for a long time. Everything on top of that (minus Di2) = marginal gains.
Basically newest 105 is the older Ultegra... so make what you want of it.
I wanted to buy aluminuim but got a sweet deal on a supersix evo (2016) and i LOVE IT. It's ultegra and it hasn't failed me.
CAAD frame normally is same geometry as the supersix, only big difference is alu vs carbon. If you're "serious" about biking and will keep riding, 105 will get you in the game and keep you in there for a long time. Everything on top of that (minus Di2) = marginal gains.