I've been reading and researching different peices of equipment, and I can't come to a conclusion on my own.
My sources are:
Classical/Orchestral (strings mostly, violin and cello)
Classic Rock (The Band, Eric Clapton, The Kinks)
I currently own a pair of Grado SR-60s. I love them to death, (literally, they've been resurrected a few times). I just recently switched the stock pads for the open cups that come with the more expensive grados in the SR line (what a difference that made!). I travel a fair bit, though not a huge amount. I listen to music in my office with an obnoxious air handler, so I'm looking for noise isolating headphones.
The amplifier that my phonograph was hooked up to recently died, and I don't have the time to tear it apart and fix it (it was a junk store find when I was an undergraduate).
I have ~$250 to spend (could stretch it to $300, but no more) on some components. I want a DAC, but I also want to be able to listen to vinyl, so a DAC/amp that could take a line in from the phono preamp would be awesome. Since I move back and forth (and don't have the money to buy two of things) the more portable the better.
I would also like a pair of headphones that is more noise isolating than the grados are for work and travel. I'll leave the grados at home where its just me and the grandfather clock.
As far as whats important in sound: not bass heavy, very detailed, and even across the spectrum (pronounced mids without harsh treble).
Would it be better to sink all the money into a nice DAC/Amp and keep the Grados going for a while, or is there a compromise between headphones and the DAC/Amp. Should I get a dedicated DAC, and a portable Amp? Theres just too many combinations, and I want to make sure I get the most bang for my buck.