So i'm upgrading from a arctics 5 to a Sennheiser hd650. Ive never really tried a "audiophile grade pair of headphones so I really dont know the difference between each and everyone. I was wondering if this would be a huge upgrade from audio quality and what would be the differences. Keep in mind that i'm new to this audio stuff so I don't really know anything. Do I need to buy an amp for the headset? What are some affordable mid range options that wont break the bank preferably around 100-200$ CAD