Hm...I'm pretty set on getting a little audio setup going after I move into my new apartment and was eyeing the HD6XX but the 58X are tempting as well...what do I do!?!?
Get both?
Seriously though, if you can afford it, they are different enough to give a (related but) different listening experience.
If I were to get the 6XX, would my best bet be the Magni 3/Modi 2 combo? Will that work fine off of my 6 year old MacBook Pro?
I’d bet it would. I have a Modi2Uber that works great with my MacBook Pro (mid 2015 model).