Well, I feel a little hamstrung with just the CS 5000 and 6000 to choose from.
I'd at least put the Mercury II and Pansat 3500 on the list to think about.
Have you considered one of the low cost units with blind scan
and the ability to record your shows?
Coolsat 7000, Conaxsat Duo/Trio (review on this site), or the Visionsat IV200 (reviewed on this site).
Some if not all of those will do blind scan.
I think SatAV sells the latter on FleaSpray for a quite attractive price.
Read CharredPCs thread for encouragement.
To connect to two or more receivers, an LNB with two outputs would be mandatory.
...Followed by a 2x4 (or maybe 4x4) switch.
Kind of depends on if everybody looks at one motorized dish, or you want to add extra fixed dishes to the mix.
I would buy a QPH-031 for my next LNB, but I'll stop short of recommending one.
I'll suggest it, though.
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Invacom SNH-031, SKY Mexico DVB321-3, Fortec 36", AzureShine 36", Mercury II, Satpros DSR500s, Twinhan 102g & StarBox
Thanks to Sadoun & SatelliteAV for good deals, & SatelliteGuys for good reviews.