Then get the Emonda.. it's killer ride. Mine is a 2015 SLR and the new 2021 just came out.
I personally think the SL with Ultegra is the best bang for the buck. But 105 is a good choice and a bit less expensive.
I'm a old fat man and been cranking out 150 miles a week on mine. Just takes a bit to get your "fit" dialed in.