@daysleeper, not to you but to those you referred in your post that says "amp sucks, amp didn't work, Grado sucks, Grado doesn't work, blah blah"
An amp is the middle chain between your source and headphones, so you have to be careful to make it a strong link. Don't just randomly introduce an amp to your audio setup just for the sake of amping.
Grado 325is/HF2 pairs well with LD MKIII from my experience.