So you'd say the mids of the PS500 are recessed? That's certainly helpful, and also saves me money. I do need bass, but anything more than the SR80 has is going to be nice. Which includes every headphone ever. Sounds like the RS2i is probably what I want. Also didn't realize the PS500s are actually heavier, I'd have thought they were lighter. Thanks.
I would seriously consider the Alessandro MS-2's. They are modified 325's with a neutral palette, ideal for classical music. And they're ~$300.