Hi, I'm looking to get a refurbished Macbook 12" (2017 model). The Apple online store has the m5 model with 512GB HDD at about $120 USD more expensive than the m3 model. Is it a no-brainer to get the m5 model or am I really only paying for the extra harddisk space? My usage is mostly office work, watching videos, and occasional video editing (very rare). No gaming.