Since you like the WA7d with your HD600 it will probably sound quite good with the HD700.
I've seen used HD800 at $700 and even a few with the SDR mod for $725. I got my HD800 new for $1050 a few years ago but I still like the HD700 better for some genres while the HD800 is hard to beat for well recorded/mastered classical.
I definitely prefer the 700's since a majority of my collection is electronic, game soundtracks, and Rap/Hip-Hop so a more fun energetic sound is definitely what I'm after after going through my 'warm' sounding phase. Just didn't know the 800s could go for so cheap on the used market.
Now I'm really having a hard time figuring out an amp pairing. I'm starting to run into treble issues with some rap music as some artists master their music with a lot of treble to begin with so adding that with these cans is causing some of them to sound harsh. I only really run into this issue with modern Rap as Old School Rap and Hip-Hop was more bass centered and boom-bap type style. I've also only encountered this issue with some Brassy Jazz.
I really want the Valhalla. From what I've heard it's accurate and precise, a bit dry and lean, but with a tiny bit of warmth to keep the 700s from going too far in one direction. On the other hand, the BH Crack is supposed to provide a nice silky warmth but I'm afraid that might smooth out these cans too much and make them boring and lose someof their soundstage/preciseness in the process. What have been your experiences with your Crack + 700 so far? The impedance mismatch was also another con for the Crack.
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