You have a budget for an HTPC / casual gaming rig, and those parts are your choices? Damn. Nice rig. Any oc'ing? If so, add an aftermarket HSF and change the Ram for some PC2-8500 sticks. I recommend Mushkin. Also, do you need RAID? If not, you could choose the GA-EP45-DS3L instead (it doesn't have inbedded Firewire though).
The motherboard was chosen for crossfire in the future when games start pushing the single 4870 at 1080p, as for the ram I do not intend to OC if I can help it, want to keep temps down since it will have a sat tuner that generates more then enough heat on its own. Also I wanted the teamed network cards since it will be serving the media files to other people on the internal network too and want to limit chances of bottlenecks.
As for the aftermarket coolers that the next stage in a couple of paychecks : P gonna add a hr-03 to the vidcard and most likely the noctua for the processor as well. I am planning on populating all 5 120mm slots with some s12-800's most likely or something similar, specially once the HDD bays start getting populated with more drives.
As for the PSU cable management, I did think abotu it but I honestly don't trust modular designs and wanted the rock solid power ouput and noice levels of the silencer. Ill just put in the effort for the cable management and get it done nicely.
And I just spent some more money, I don't like the thought of trusting an old hard drive I've been banging around for a year+ as my main drive so I bought a seagate 7200.11 640gig as my main drive. I was going for the WD since it's faster but then I looked at the noise levels and decided with the seagate. Price matched DC from ncix and should hopefully be getting it by friday since thats when I plan on building the Rig.