Ip igmp snooping querier on Nexus, what source IP address to use?

Am looking at a problem with servers in the same vlan across multiple switches that are unable to communicate using multicast. I have found that in the systen I'm to set up I need to apply the ip igmp snooping querier command, in the vlan, but it needs a source IP address.
Different documents make conflicting recommendations for this address, one suggests that any unused address will do, another suggests to use the IP address that is configured on the SVI for the vlan.
Which is correct?

Eventually I had to ask Cisco TAC, the response was that any IP address within the subnet could be used. The recommendation was to allocate an unused address in the vlan subnet for this purpose, use the same address on multiple switches should resiliance be required.

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    In our organizaiton we have Red Hat Cluster with 2 cisco switch (Model: cisco WS-C2960S-24TD-L, Version: "flash:/ c2960s-universalk9-mz.122-55.SE3/c2960s-universalk9-mz.122-55.SE3.bin").
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    i've been reading these forums and noticed that lot of people have problems with configuring multicast. basicly, problems are flooding bandwidth, no querier, confusing pim router configuration ...
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          gi2            247          237           6          43733    
          gi3             0            0            0            0      
          gi4             0            0            0            0      
          gi5             0            0            0            0      
          gi6             0            0            0            0      
          gi7             0            0            0            0      
          gi8             0            0            0            0      
          gi9             0            0            0            0      
          gi10            26          2962          3          850881   
          gi11            0            0            0            0      
          gi12            0            0            0            0      
          gi13            0            0            0            0      
          gi14            0            0            0            0      
          gi15            0            0            0            0      
          gi16            0            0            0            0      
          gi17            0            0            0            0      
          gi18            0            0            0            0      
          gi19            0            0            0            0      
          gi20            0            0            0            0      
          gi21            0            0            0            0     
          gi22            0            0            0            0      
          gi23            0            0            0            0      
          gi24            0            0            0            0      
          gi25            0            0            0            0      
          gi26            0            0            0            0      
          gi27            0            0            0            0      
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          gi7             0            0            0            0      
          gi8             0            0            0            0      
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          gi17            0            0            0            0      
          gi18            0            0            0            0      
          gi19            0            0            0            0      
          gi20            0            0            0            0      
          gi21            0            0            0            0      
          gi22            0            0            0            0      
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          gi26            0            0            0            0      
          gi27            0            0            0            0      
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    1    234.55.66.77 *            gi1,gi10                                  v2   
    1    239.255.255. *            gi1-2,gi10                                v2   
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    regards Dave

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