I have the Sennheiser Momentums and the HD 600. For what you need I would go with the HD 600. I don't find them bright but very natural. I much prefer the open back designs. You can wear the HD 600 for hours without hot ear.
I got the HD 600 and Schitt Valhalla OTL for under 500 bucks used. Almost everything is replaceable and washable. The HD 600 also sounds good on most built-in headphone inputs (Ipad, labtop, reccivers) maybe a tad darker and less volume IMO.
If you watch you could score them for 225 used including shipping and paypal,