The 1770 Pro can have the typical Beyerdynamic 'hot' treble issue for some people. The DT1990 Pro is the only Beyer headphone I actually like. Everything else is actually painful with the DT 990s being the worst of the bunch. The 1990s are open though.
There's the DT177X Go from Massdrop which I haven't heard but the reviews are solid. It doesn't seem to have the bright treble issues.
https://drop.com/buy/massdrop-x-beyerdynamic-dt177x-go-headphones
There's also the Massdrop x Meze 99 Noir which is a Meze 99 Classic with a different finish for $100 less than the original.
https://drop.com/buy/massdrop-x-meze-99-noir-closed-back-headphones
There's a new AKG 371 which is getting stellar reviews. I'm not sure they're actually shipping yet. The AKG553 is also pretty good.
https://www.akg.com/brands/akg/K371.html
The absolutely amazing Massdrop x Fostex TH-X00 Ebony just went out of stock at Massdrop after being on sale for $100 off for a few weeks. It would have been my number 1 recommendation in the price range and is my favorite headphone. The Mahogany and Purpleheart version are still in stock but they aren't as good for all around use.
I'd avoid the M50X. It gets recommended everywhere but I'm convinced anyone recommending it has never actually heard a good headphone. The M40X is pretty good but it's on ear and not comfortable for long use.
The Monoprice M1060C is a planar option. It's going to be heavy and build quality might be iffy but it gets pretty good reviews.