If I were lucky enough to still have my parents alive, I wouldn't move 2 hours away from them. I'm sure of that. To each their own, but to me, family comes before anything else.
We aren't moving out of the area because DH's job is based here, but even if it weren't, I'd have a hard time leaving my siblings, particularly my younger siblings that I have cared for since they were orphaned when my parents died. They are adults now, but in some ways they seem like my children. And I like the idea that my kids are close to their cousins and aunts and uncles. Of my 8 siblings, 5 live within 30 minutes of me. I like it that way, and wish I could get the other three to move back to the area.