Going down the rabbit hole... pack suggestions?

OK, I'm going down the rabbit hole. Been thinking about trying rucking for a few years, but have just been lazy. As an avid hunter/outdoorsman, rucking seems more my style. Recent lab results have me motivated to get moving.

I'll start by saying, I'm comfortable spending the money if it makes a difference. With that said, I own lots of packs already.

What I would consider buying: Rucker 4.0 or GR2

What I have currently: Eberlestock X2 or Eberlestock Switchblade (currently my EDC for work)

Thoughts on pros/cons of the above? Is it worth spending the money on the Rucker 4.0 or GR2?