Help please!!!! aero or sportive bike
History about me to help with bike choice: I am 43 years old, ex army (infantry) , ran marathons and in pretty good shape. I busted my back and medical release from the army. Hit with depression stated eating was up to 310 lbs. I am 225 lbs and still descending. Last summer did 4 sprints and few cross races and my personal best sprint is about 1 h 25 min. I have a cross bike with road tires that i use now for triathlon and cross races. This year I am moving to Olympic distance with a half IM at the end. I may not be the fastest but am very competitive (personal best or beating the guy or girl who just beat in the last race)
I do not want a TT bike but was thinking road bike with bars. With my medical history would i be better with a defy with bars or propel with bars. would there be a big time difference in half IM.
Thanks for advice