Originally Posted by
caloso
Buy the bike that fits and is most comfortable for your style of riding. And buy from a shop that you like. Everything else is just details.
Words of wisdom.
Emphasis added by me. If you do eventually decide to upgrade either components or the entire bike a good bike shop is a valuable resource.
Sora is fine quality for the type of riding you describe.
Yes, if you find yourself doing longer and more challenging rides you may want to upgrade, but if you become a bike fetishist like many of us who ride a lot, then you may want to upgrade the 105 bike also.
Brent