Good choice man, although I guess I'm biased lol. Once I got these, I felt like there's no reason to upgrade anymore. Amazed everyday with how great they sound, no matter the media being played. I wear mine for over 12 hours a day as daily drivers, the weight bothered me at first but now I don't even notice it. You'll get a neck of steel in a few weeks.
I've had my X's for almost 3 years now, and I highly, highly recommend getting a ZMF Pilot Pad to wrap around the metal headband above the leather Audeze strap. Those Audeze headband straps stretch out really quick, and you're gonna hate having to replace them all the time. Looks kinda goofy, but it really improves the comfort, and you'll never have to replace the strap again.
Once the ear pads wear out, the Dekoni Choice Leather pads are a great product for the money, super comfy and keeps that low end. I've experimented with a few Dekoni pads and they're definitely my favorite.
If you need any Peace EQs, feel free to DM and I can send you what I have if you want experiment some more. I tend to like Bassy Rap/Electronic/R&B, so I've got a few nice presets.
Welcome to the club!
You'll get used to the weight. I upgraded to my X's years ago when my Sundara's broke, and you could definitely feel the weight after a few hours. After a week or two, you won't notice it at all if you use them as daily drivers, and they're honestly incredibly comfortable with a few mods.