The Razer Iskur V2 is one of the best gaming chairs we've tested. It's stylish, easy to assemble, and we especially liked its 6D lumbar support. Simply put, it's an excellent overall gaming chair and particularly shines if you have back problems or want extra lumbar support. For a limited time, you can get the Razer Iskur V2 Gaming Chair for $399.99 via our exclusive coupon code . ( Click the coupon below to activate this discount ). That's $250 off and an amazing price for a chair we said offers one of the "best lumbar support systems in any gaming chair." In our Razer Iskur V2 review we said Razer did a lot of things right with this chair, but it's the lumbar support that makes it standout from the competition. Most gaming chairs have a flat back and knobs that adjust a lumbar bump, which often forces you to adjust your sitting style.…