@zazex, Sure, the Z7 is a fine headphone. it just doesn't hold value very well & used prices have dropped down to the sub-$400 price point before. really depends on your tastes whether you will enjoy them, so not an easy universal recommendation. has a colored bass-heavier sound signature that may not match everyone's tastes though some will find it quite enjoyable. Bass quite noticeably bloated compared to the orthodynamic entry-levels or some other nice dynamic mid-tier options. But that aspect I guess is also dependent on what you are looking for. I do personally prefer to have very tight bass notes with fast transient response even in headphones that have a bass emphasis, so I personally don't find the Z7 that appealing for my tastes.
At original MSRP, there are a lot of alternative closed recommendations in my mind, but it really does just depend on the sound signature you are looking for. My personal closed favorites that I feel offer tremendous value
erformance include the PM-3 at $400 msrp, HP50 at $300 msrp, K545 at sub-$200 w/ current amazon pricing. These are all more neutral orientated options though (as that is more my sound sig preference). For bassier options, I guess I would personally splurge the extra money for a used TH900 instead (though I think those are also a bit of a stretch at MSRP for their performance at their price point). The TH600 and recent Audeze EL-8 also matches the Z7 price point (though I do think that whole price range is not really a good place to hang & overpriced imo). I do feel like all three of those $700 MSRP has too many compromises to justify their price tag. I think it would be wiser to either save a bit more for a true flagship or drop down in price range. I don't think that $500-$800 price niche for closed headphones to be very competitive at the moment. No real closed standpoint products there from my experience (though the Alpha Dog & Alpha Prime has now fallen into the $500 & $800 price respectively, and I was pretty relatively impressed with the Prime even at $1k). I find the flagship range of $900+ or mid-tier sub-$500 range to offer much better value & more competitive sonic performance for my tastes. These are just my personal opinions so feel free to disagree.
I would just strongly recommend demoing the Z7 prior to purchasing or buying from somewhere with a good return policy as you will be selling these at a severe loss if you end up not liking them. That being said, there is no pair of perfect headphones so maybe the Z7 will match exactly what you are looking for. If you are interested in a more bassy pair of headphones, I would recommend demoing the Z7 if you can (Sony stores don't let you though). I can see the Z7 fitting certain people's criteria very well. Just a bit harder universal recommendation as I think it has an unique sound signature that really needs to match what you are specifically looking for imo.