Voodoo- Neither of those phones will give you anything like what they are capable of w/o a headphone amp, but you can use one in place of a pre-amp in most systems, if they have a loop out feature. For detailed reviews, go to head-fi.org. Most folks feel that the Grados are more forward, the Senns more neutral. The Senns are definately more comfortable to me. 200 hrs is not a lot of time if you are buying used.
Need help with Grado 325i vs. Senn 600's
I am looking to get a good pair of cans since I am in college and cant afford the speakers I want. My buddy just got the 325s and they seem nice, but I hear a lot about comfort. How does sounds compare? I will be using cans alot, so comfort is an issue. What about an amp? Someone hit me with some knowledge.