Just thought I would let you know what all Media Center related toys I have in my home. I have two machines, one my being my main CableCARD machine and the other being my backup/test machine. Check out the following for a full rundown:

Primary PC
Dell XPS 420
Microsoft Windows Vista Ultimate 32 BIT w/ Service Pack 1
TV Pack 2008
Intel Core 2 Duo E6850 @ 3.0GHz
3GB 667MHz RAM
NVIDIA GeForce 8800GT 512MB
3.5TB total hard disk storage (2.75TB internal; 750GB MyBook FireWire Drive)
2 ATI Digital Cable Tuners
HDHomeRun (2 QAM tuners)
AverMedia A180 (QAM tuner)
ATI Theater 550 Pro Analog Tuner
Xbox 360 Elite Media Center Extender (Living Room)
Xbox 360 Arcade Media Center Extender (Bedroom)

Backup and Test PC
Dell Dimension E521
Microsoft Windows 7 64 BIT Beta
AMD Athlon 64 X2 Dual Core Processor 3800+
2GB 533MHz RAM
NVIDIA GeForce 7600 GS 256MB
460GB total hard disk storage (all internal)
AverMedia M780 (QAM and Analog Combined Tuner)

I’m definitely happy with my setup right now. With the addition of TV Pack 2008 I was able to add the analog tuner along and the additional A180 QAM tuner with my 2 CableCARD tuners and HDHomeRun tuner for a total of six tuners. So far I haven’t had any problems with conflicting recordings.