Question about Dell UltraSharp U3425WE

Dear Community, dear Digitec team I am looking for a suitable monitor arm for this Dell monitor. Can you recommend a suitable monitor arm (if possible in the colour white)? After some research and test reports, I came across these two, and I would be interested in your opinion: -Ergotron LX monitor arm with patented CF technology (https://www.digitec.ch/de/s1/product/ergotron-lx-monitor-arm-mit-patentierter-cf-technologie-tisch-34-monitor-halterung-10156658) and -Ergotron HX monitor arm with patented CF technology (https://www.digitec.ch/de/s1/product/ergotron-hx-monitor-arm-mit-patentierter-cf-technologie-tisch-49-monitor-halterung-6198698) Thank you very much.