The second scenario will work but not as well. There will be sync issues either way. Having two independent 9865s is probably more reliable but then the advantages of WH are lost. The limit for WH is two 9865s and 4 boxes total. Don't know what the limit is for non-WH PVRs.do I need 2 PVRs or would 1 9865 and 1 STB work?