We don't have any official reccomendations for brand or models.
A dedicated switch is suggested as best practice to avoid possible issues related to (often seen) forgotten configurations on existing switches that led to troubles in some networks (eg: networks where switch config is not accessible by local admins and they didn't know about multicast lockdown or something similar).
That said another reccomendation is, even if NodeWeaver works on nearly almost unmanaged switch, not to go with home/desktop switches just because it works.
The NodeWeaver DFS is a core component and is strongly relying on network performance/stability.
That said I personally reccomend a good switch that can be monitored (many major vendors offer unmanaged switches that have SNMP and can inform your monitoring system about faults).
My 2 cents on some good-bang-for-the-buck switches in the cheap zone (read: "don't go below these, please") are:
note: I'm in no way linked to Netgear or HP, these are just my 2 cents. I'm just reporting what I see around that is SME-focused and will grant a decent quality in handling the NodeWeaver packets without draining your pockets.