FoxHound ROM was one of the fastest/best ROMs ever on the Galaxy S2 and Galaxy S3.
Now, the developer of FoxHound ROM XDA user Raffaele88 has picked up a GT-i9505 to continue his awesomeness into custom ROMing.
His latest creation of the FoxHound ROM for Galaxy S4 comes with call recording, UI customizations through Nottach Xposed app, Xposed App Settings (For running apps in Phone/Tablet mode), inverted Play Store with multi DPI support, Init.d support, and Nova launcher in replacement of TouchWiz launcher.
Of course, you will also benefit from complete de-bloating of most Samsung apps while you will be able to keep core functions such as multi-window, Smart Scroll, etc…etc…
You should definitely check it out.