I had great results using Slate VSX for mixing. However, I don't like them so much for just playing guitar. The rooms emulated in the software sound a bit too ‘hyped’ to me for that. The non-spatial profiles such as ‘Human Linear’ are better, but somehow the upper mids always sound a bit aggressive.
After much deliberation, I have now ordered a pair of Sennheiser HD 650s, which should be delivered today. From everything I've read, they're supposed to sound very neutral and, above all, not too shrill or unnatural in the upper midrange. I'm really looking forward to trying them out later!
With all the headphones I've had so far (except for the rooms emulated in VSX), it was always extremely important to add a little bit of room ambience and/or crossfeed to make the guitar sound natural and pleasant. So that would be my tip to anyone considering buying new headphones. Try a little reverb or crossfeed first; some models also benefit greatly from frequency response correction, e.g. with Sonarworks.
now they just sound relaxed and lovely. its wild though cause at my desk flipflopping between my hs80s and them- its super close.
