Current bike - 2015 Giant Defy Advanced 2 with Boyd 44mm disc brake carbon clinchers. Size small and 105 setup.

Available Bike - 2016 Giant Propel Advanced SL-0 with Giant SLR wheels. Size small with DI2 setup. $3500!

Although I love my Defy, there is no way my wife will agree to having both. I know if I sell it, I am going to wish I hadn't. But, I've wanted a Propel for awhile now. What to do....

Anybody have experience with both a Defy and Propel that can offer insight?

Thanks