MCE 2005 system here:
Biostar IDeq 200V SFF
AMD 1600XP
512MB
80 GB system/music drive
160 GB recorded TV drive
8x DVD burner
9600 XT + Component adapter
Hauppauge PVR150 TV card
Audigy 2 NX USB2 soundcard using optical SPDIF passthrough
MS OEM remote
TW Digital Cable
Using PowerDVD6 as decoder
Connected to Onkyo SR600 6.1 receiver and Samsung TXN3245FP EDTV hacked to HDTV (soon to be replaced with 32" Syntax Olevia LCDTV)
MCE Tweaks/Plugins:
Sonic Encoders for VideoDVD & DVD Slideshow burning
MCEWeather -- Weather channel plugin
MyMovies -- Offline DVD management (soon to be paired with 3 Imation
Disk Stakkas for autmated disk retrieval from MyMovies interface)
GamEX -- MAME/SNES emulator MCE fronted (awesome!!!)
MyNetflix -- Netflix account management through MCE interface (cool idea but needs improvement)
I built this machine as a project and was tested with the bedroom TV, but it has taken over our TiVo's place in the living room I love it so much. There are a few TiVo-exclusive features I miss, though...