INTRODUCTION:   First of all I just want to thank everyone involved in making these headphones and for providing me an opportunity to write a review on these. I'd like to focus this review by mainly comparing the SennGrados to other Grados, but I'll also compare it to other headphones like the Mr.Speakers Mad Dogs 3.1 as well as a surprise boss battle by the Grado HF-2s!   EQUIPMENT:   I currently own the O2 DAC/AMP combo and will be using that with my laptop for this review. SOUND:   When I first listened to the SennGrados, I immediately...