The recommendation is very much dependent on the budget available. The EtherRegen is a great starting point an offers room for further upgrades with power supply, clock etc. The LHY switch is a nice next step.
When going „big“ it’s definitive wise to go also for an integrated solution consisting of switch, power supply and reference cable geared to each other perfectly. In that regard the new Tempus switch by Network Acoustics as has already been mentioned here is amazing outperforming even far higher priced switches.