My advice is to go up a model or two from entry level. The first couple of steps up will give you more reliable, better performing components with moderate weight savings for just a few $100 more. Jumping the next step from enthusiast level to high end is more about weight and finish than reliability. Some parts are actually less durable for the sake of using lightweight alloys and less material.

Think about where you want to be in a couple of years. If you plan to be a serious enthusiast who wants to ride frequently for a lifetime, skip the Sora level components and start out with 105 or higher. Talk to riders who have been doing what you aspire to do and see what they recommend. Find out what they have upgraded and what they wish they had bought in the first place. In general, buying a lower level bike with the intention of "upgrading" later is no cost savings in the long run. On the flip side, it doesn't pay to buy a Ferrari when what you really need is a reliable sedan or SUV.