I would go for the Quick 3 which has a more useful gear range.
You can add bar-ends and aerobars to the flat bars.
You can change the flat bar to a Jones bar (Titec H-bar) or Trekking bar (or others) to provide multiple hand positions and utilize the existing shifters / brake levers. You could actually add trekking bars & racks to that bike and tour across the US.
Many of us here have multiple bikes but the type of bike you are looking at can do 100% of what you want to do now and serve you well into the future, even if you do at some point decide to try drop bars.
Go for it!