Yo he usado manjaro, arch y actualmente uso artix en mis dos computadoras. Manjaro descártala, artix por lo general funciona bien pero eso de que no tenga systemd llega a genrar problemas dependiendo el software que uses. Arch nunca me dio ningun problema que no se solucionara facilmente o mo fuera culpa mía.
Nothing, there is no reason to put that much RAM on your system if you don’t even know what to do with it. “What is someone who only uses his car to commute supposed to do with a supercar?”