You will need to full wipe and reinstall everything again.
I've never used Virtuous Inquisition, so I don't know about performance, but latest 4.4 roms we have are really smooth. If you want to test, just make a backup of your current setup, then install any new. If you don't like it you can always restore to your old setup.
Though since most roms we have are based on cyanogenmod, most of them have a bug at the moment causing the system to freeze or maybe restart. Only 4.4 rom (which I know) which isn't affected by that is omnirom.