HTPC decisions

For a while I have been contemplating building a Home Theater PC myself. I almost went ahead with it were it not for the arrival of summer and news of new AMD chips/chipsets. This delay gave me more time to do more research, and now I am undecided on whether to build or buy a HTPC.

Why build:

• Custom picked components
• Fun of assembling a PC
• Cheaper (?)

Why buy pre-assembled:

• Saves time and trouble
• MS XP Media Center Edition (MCE) 2004 is still the best out there, and MCE 2005 is to be released this fall. Unfortunately MCE only comes with OEM systems.
• Cheaper? I just got an online quote for iBuyPower's HTPC, and the price is very competitive.
• The newer components (e.g. AMD 939 chips and chipsets, PCI Express) are too expensive, so they are not relevant anymore.