I'm looking to get a quality set of headphones soon. My buddy has taught me to never buy audio equipment without listening to it first. Heres my situation. I can get my hands on a set of 'phones(Sony MDR-V500DJ) and listen to them, but i want to buy the next model up(MDR-V700DJ). If I like how the lower model sounds, would it be safe to say that the higher model would sound the same or better? I ask b/c I'd have to buy the MDR-V700DJ's online. I don't think I could listen to them directly. Your thoughts would be appreciated.