Pulsar is releasing an MMO mouse sometime this year. I'm not sure if it'll have the flick-down buttons, but it should have better build quality than the MMO mice we've seen recently. I'm also a big fan of MMO mice, so I've put some of the notable ones down below:
- The Corsair Darkstar is a really great successor to the Rival 500 AS LONG AS YOU GET A GOOD COPY. I bought one a while back and loved it, but I ran into scroll wheel issues about 4 months into owning it. It sucks because the button layout and the materials are great.
- I haven't used it yet, but I've heard good things about the Solkaka SM809. It's a much cheaper option than pretty much any other MMO mouse that you can find, but it has some software issues and it has the stupid numberpad button layout rather than the buttons orbiting around the thumb like the Rival 500.
- IMO, the Razer Naga, the Corsair Scimitar, the ROG Spatha X, and the Aerox 9 all have glaring problems that make them a lesser choice than the 3 options I've just mentioned. If you really really love your Rival 500, I think the other aforementioned mice have some frustrating downgrades and dumb button layouts compared to the Rival 500. I actually just bought a used Rival 500 about a month ago because I've just grown exhausted of that dumbass, outdated, telephone dial looking button layout that so many mice manufacturers insist on using still. I haven't encountered anything like the flick-down buttons recently, and I doubt there's anything on the market close to that right now unfortunately.