Since you also plan on running monitors via the dock: Keep in mind that especially in Linux the AMD driver(s) involved are still a bit of work in progress wrt the various docks’ idiosyncracies with displays over Thunderbolt (or rather USB4). “Plain-er” USB docks seem to fare better overall. So you might want to hold off on getting anything fancy dock-wise until this is resolved. Maybe live with one (or two?) HDMI/DP extension cards for a while?