The only headphones ive had or even listened to are my plantronics backbeat pro noise cancelling wireless headphones, i am definitely a beginner. I couldnt tell a "warm" sound from a "bright" sound, and i dont even know what a "V shaped" sound is. I've been looking at selling these headphones and buying a nice pair of open back wired headphones. Im going to be listening to mainly 70s music (eagles, CCR, lynyrd skynyrd, etc.) and i almost value comfort above sound. are there any upgrades from the headphones i have worth my money that are under 250$?