Default Looking for a New Rom...

Hi guys, i had my nexus 7 WiFi on Stock Rom for a long time. Since a few days its getting slower and slower so i would like to Flash custom Rom.
There Are Tons of Roms and I dont know which to choose.
So which Rom + kernel would You recommend? Should be fast, stable and Support Multi User.
Hope You help me..

Cheers

Gesendet von meinem Nexus 4 mit Tapatalk