Can't complain with that list.
They need a good dose of EQ centered at 1.8k +3.4 Q 1.4. also a little tamer down around 750 hz but just 1.2 db and abroad Q like .8. Bass is excellent, but most expect 20 Hz to be as loud as 60 but the human ear doesn't work that way. because I use them with no screens (v1), I have a little +2.8 at 45 Hz Q 1 on a bass shelf - I think one could go to +4 db, but after that its not on the recording. There are a few hot spots in the treble. A broad one centered around 3.5k - say -2.8 db Q 2.4, and around 9.2k -3 db very narrow 9.0 Q - but you might have to hunt it by ear since it can show up at 8,4k or about 10.2k but if you try to cover the whole area you lose too much music. There is a subtle one around 6.2k very narrow Q like 8.4, and just down 2 db. At least not settled.
I gave up speaker cable and RCA wars on my nearly SoTA equipment back in '95, but the HFM stock cables in the 500, 6 SE, 6 SE v2, HEX v2, Ananda are all audibly not correct. a simple OFC DIY buries them. I don't like the pads on the round cups - even the 400i, 6 OG, 560, 4XX, 5LE, 5SE, 6SE - meh. Plus I admit that velour makes my ears sweat but don't like the sound. The long cup pads are actually pretty good.
Beyond that the fuzzor mod cuts down reflections and cancellations - but not as much as the 500 or OG 6 because the stators are thinner, and it helps the v1 more than the v2 I imagine, but haven't tried it. I like very taut damped bass so I put some dynamat on them (back along the rear edge but only about 40-50%, broken into 3 different sized pieces), to corral vibrations a bit - the cup material of all headphones vibrate after all, and they do produce some good bass. by volume, and with the dynamat speed and timbre more accurate.