Standardize fixed TCP/UDP port selection for NFS firewalling?

NFSv4 and later has (a) fixed TCP/UDP port for communication; NFSv3 and earlier use dynamic ports discovered through the ONC RPC portmapper on udp/111.

Windows Server supports serving NFS 4.1, but as a client still only supports NFSv3, so I need to support the traditional ONC RPC ports. As we all remember, these are normally dynamic and play havoc with firewalls, which don't have ALGs for ONC RPC, and with NAT, for those situations where it must be used. Luckily, the ports can be fixed to well-known ports in modern implementations.

Most Linux distro documentation uses some ports in the 32000 range, but NetApp's default fixed ports are notably different as are Isilon's.

service	NetApp Clustered Data ONTAP	Netapp Data ONTAP 7 Mode	Isilon
portmapper	111	111	111
nfs	2049	2049	2049
mountd NFSv3	635	4046	300
statd NFSv3	4046	4047	302
lockd	4045	4045	304

I'm interested to know if you standardize these in your environment, what standards you use, and if there might be anything any more authoritative on what the standard should be.