I agree with DG. MIT makes caps that sound good, mainly the RTX (styrene and tin) and PPFXS (polypropylene and tin). Before spending big bucks, you might want to try some smaller valued caps in your system, and see what works in your system. Some caps sound brighter than others, and that may sound good in your system. In your system. Can't repeat that too often. In your system.
Some caps may sound so bad that you think of giving up listening. I'm serious. And if you've just spent big bucks ... well, you just might.
I would begin with MIT (above) and Relcap Teflons. Then see.