2017 Cannondale slice question

If the price difference between the Cannondale Slice 105 and Ultegra is $400, is it worth to get Ultegra considering the hollowgram crank? Or spend the extra for a better bar?

Thanks

You can buy an entire Ultegra 6800 road group for $580. Then sell the shift/brake levers for $200. Replace all of the parts on the bike and sell the take-off group for $300.