High speed, low phase shift capacitors

[Zenith26kc20]

At the risk of sounding like an audiophile (can't help it, I am one), Has anyone tried some of the designer capacitors (Solen, MIT for example) in the video circuits of their TV's? I may get curious over the next week and see what happens! I have to pull the chassis anyway to change the crt bias control so it may be something to try.
These caps are advertised as low phase shift/low loss and more. I have used and like the Solens in audio. Let me know!