I replied to an above comment, not when utilizing KDE's widgets and other desktop integrations like RSS feeds, weather, embedded system/server informations, etc. KDE is amazing, but I like to utilize the widgets, and full functionality of things with it. With my i3, 8GB RAM I opted for Manjaro XFCE.

I absolutely suggest using KDE for people switching over. Full desktop experience.

When not using anything my systems would idle at around 800MB-1GB running default install Manjaro. Firefox after awhile and I was using the full 8GB and tabs were crashing.