Probably a bit late for you, but I strongly recommend that you use a DNS name rather than an IP address.

Further, it should be a DNS CNAME (alias) for the service, not the machine name. This will allow you to change it at will later, without affecting your clients.

The same principle should be applied to any and all services you provide (e.g. email). The only services you cannot do this for are WINS, DNS and DHCP.