What Raspberry PI are you using?

So I tried to use a venusOS on a raspberry pi zero 2w which worked great for the standard image but when I switched to the large image and turned on signalK I found it to be buggy and slow. After installing Btop I can see it is completely out of ram and too much interaction with signalK overwhelms the cpu quickly so considering to upgrade to a raspberry pi 4 but im not sure which version of ram to get. Id love to hear from others that are running a raspberry pi which Pi your running and what services you have runningi (node red, signalK, any signalK addons). Thanks for the help