I'd avoid wireless headphones. If you do get a nice pair of wired headphones, you may want to consider getting a dedicated headphone amp. I like the Grado RS1s. I had the Sennheiser HD600s and they were too laid back. I also had the Stax Omega II/SR007t combo and that was breathtaking but that combo may cost more than you're looking for. With the Grados I am using an Emmeline XP7 headphone amp.
