It's been years since the HD598 had any cracking issues; Sennheiser was very quick to fix the issue.
I actually started my HD598 journey with my Yamaha receiver and can tell you that they sound fantastic!
Don't worry about the bass, they have a great response, especially with a receiver. While they are not for bass-heads, they are not lacking.
I mostly use my HD598 for gaming and can honestly say I have sold my Sennheiser PC350 because they just couldn't compare. For Jazz, piano, classical, and rock (not metal or hardcore), and especially electronica, they sound fantastic!
Thank you so much for your fast reply!
I live in Romania, and here the price of 558 is 174 euro, and for 598 it is 208 euro. Would you say the 598 is worth the difference?