Picked up a Sony MDR-Z7 again the other day. Got it with a Kimber Kable for under basically under £300! bargain! I've owned this headphone before and it's good but I felt it was overpriced(Paid £400 before) but for £300 it's a good headphone. The Kimber Kable sounds a little cleaner and smoother but it's probably a 1% difference but I'll switch back in a week or so to see if there's a difference.
The Mid bass isn't as hefty as I remembered but that's prob because I'm used to the NH. It's certainly a very bassy headphone but I think it's mids have enough clarity to make this decent. It's not really lush like the NH, the mids sound like the 1R with more depth to voices.
I've been spoilt with some headphones that do vocals really well and the Z7 is close but not quite as soulful as some of them. It does vocals better than the other closed phones I've had apart from the Mad Dog 3.0 which was basically a closed HD650 or at least the nearest thing to one.
Knowing I paid £300, I'm happy with them, been using them for gaming and movies and and while they sound more closed than I like for gaming, it does sub bass better than my AKG's and is overall a more refined headphone. The imaging is really good as it's deep, and accurate.
I've also had the Sennheiser G4ME Zero for a while, mic is quality but the build quality is rubbish, hate the feel of the 500 series. I'm not sure which model it is based on, think it's the HD558 as the GZ sounds warm where the HD598 has some warmth but is quite geared towards clarity.
The GZ sounds decent, soundstage feels about medium sized for an open headphone. It images ok. lack of ultra low bass but has good mid bass punch like most Senn's.
I would like AKG to come out with gaming headphone that has lower impedance. I can't be bothered with all the mod mic stuff and a lot of my gear is now for practical use.