I have been riding a Specialized Siruus Sport for the last year and spent more time on the road that originally imagined (over 1k Miles). I’m needing some basic guidance on an endurance road bike. I plan to ride 1-2k Miles this year. I’m 6’ and am 285# muscular build. I plan on visiting a couple of shops this month and test Giant, Specialized, Trek and Cannondale. Anyone have advice for a frame suitable for my frame?