okay so, As someone who has sat with both and still owns his 9500 I feel I can probably chime in here. DT 880 is fantastic for gaming. Though if you want bass? I would recommend switching to the shp9500. While you won’t have as much detail or resolution all that jazz the shp9500 is cheaper(it can be bought around $48 actually if you shop around) and can be fairly modified. It changes its sound very well upon pad swapping, can use a v-moda boom pro microphone plug in, doesn’t need an amp but can make good use of it(if you want bass and a cheap combo unit grab ifi zen dac on that one), can be made into a wireless headset through the use of a 3.5mm bluetooth dongle setup. If you get shp9500 grab modhouse adapters and some pads. Suede will somewhat balance out the sound bring in the treble but it will make it very very bassy. Velour will keep the traditional sound out of the gate and sound similar to a beyer like the 880s as its a neutral bright which keeps it great for competitive gaming as the soundstage will remain large and accurate(not as accurate as the 880 however) and at the same time you can experience a variety of different sounds through a simple change in the pads.
A fun alternative to the DT 880 is the Tygr 300r if you can get your hands on them. Not the best for competitive but fantastic all rounder. Another balanced sound all rounder would be sennheisers 500 series or if you play more narrow fps like cod, rainbow six, etc you can go with a 600 series.
Alternatives to the dt 880 would probably be more along the lines of the hifiman Sundara, which sounds better in my opinion, or the HarmonicDyne Helios
You can find a whole slew of headphones and guides and explainations over in my write up and may help explain a few things (update in progress) Falenkor's Competitive Headphone Write Up. Now with added Hardware explanations! - #67 by Falenkor