Master Backend:
Linux: Arch Linux stable
Motherboard: Gigabyte GA-MA790X-UD4P.
Processor: AMD Phenom II X4 940 Black Edition Deneb 3.0GHz Quad Core processor.
Case: Antec Sonata III 500.
RAM: G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500).
Hard drive 1 (mounted /): Seagate ST3250620AS Barracuda 7200.10 250G.
External Array cage: Sans Digital TR8M-BP 8 Bay SATA to eSATA (Port Multiplier) enclosure.
6 RAID5 drives (mounted /mnt/raid5): Western Digital Caviar Green WD7500AADS 750GB (5 in array, 1 hot spare).
HD Tuners 1-4: 2, dual tuner HDHomeRun network tuners.
SD Tuners 5-6: Hauppauge PVR-500 dual tuner.
SD Tuner 7: Hauppauge PVR-150.
At this point, I no longer use MythTV as a frontend. I am using my PS3 with a 51″ Samsung Plasma TV for one, and an LG BD570 Network Blu-ray Disc Player with a 42″ LG LCD TV.