Short answer: The best pack is the one that works for your needs and gets you outside.
Long answer: There is no objectively "best" pack. There is a seemingly endless variety with different features and designs targeting different price points and activities. You are standing at the entrance to a rabbit hole; how deep you go depends only on how much of a gear nerd you are.
Edit: Assuming you're in the US, REI is a convenient place to start browsing.