If you've flashed many EVO ROMs, then you've probably run across Chad Goodman's AnthraX series of kernels. They can be under- or overclocked for battery life or performance, the GPU is clocked faster by default, and basically anything you can think of a kernel doing, it does. And it now claims to be the only EVO 3D kernel to provide 100% Beats support in the actual sound drivers.
His newest offerings are for Sense 3.0, 3.5, AOSP, Ice Cream Sandwich, CDMA, and GSM EVOs. So as long as you're actually holding an EVO, chances are it will work with any ROM you can throw at it.
If your ROM supports it, the Beats by Dre codecs are built into the kernel, which should deliver the full Beats experience to your EVO that devices like the HTC Rezound deliver. Also, depending on ROM support, ZSL (Zero Shutter Lag) is built in and should produce instant photo results as opposed to "two seconds from now" results.