Yeah upon research it doesn't seem the Grado's are the most comfortable, I'm most likely going to rule them out
For the build quality and availability on the market I'm probably ruling the Hifiman 400's out as well
For comfort and overall sound quality this leaves me pondering the Sennheiser HD599s along with the 600 series you mention
Again, if the 599s are easier to drive (50 ohms versus 300) I'm maybe leaning towards those (without really knowing my arse from my elbow on the subject)
I'm not sure how to find out exactly the spec of my sound
In the software tab of my AMD Radeon settings it says AMD Audio driver version - 10.0.1.6
I bought this years ago when I had my PC built and haven't added any additional sound cards:
https://www.amazon.co.uk/gp/product/B00K8KMAW8/ref=ppx_yo_dt_b_asin_title_o04_s02?ie=UTF8&th=1
Does that give you any insight into my audio spec of my PC and help ascertain whether the 600s or 650s would drive okay? I mean I could just buy an amp if going for one in the 600 series but don't think those things are going to be cheap
Cheers!