Noob Build - Efficient/Quiet Build

Hello,

I am looking at building my first HTPC. (efficient and low consumption)
I must admit; I am not really knowledgeable on all the pieces needed and how they all fit. I have been reading tons of information online.
I am looking for a HTPC that would stream HD (720p and 1080p) content that is downloaded. The HTPC would be running a bit torrent client in either Windows or Linux. (If possible this would also replace my file - media server)

I have been looking at the Zotac IonITX F-E http://www.newegg.com/Product/Produc...7;20IONITX-F-E.
Is the ASUS AT5IONT better?

Is there another mobo/cpu combine that would be better.
Any case recommendations with power supply?

Budget $300-$400

Any help and guidance would be greatly appreciated.

Thanks

I would rather get a full fledged CPU with a mobo with good onboard video,...
Athlon X2
http://www.newegg.com/Product/Prod [...] 6819103903

Biostar 880G
http://www.newegg.com/Product/Prod [...] 6813138283

RAM - 2GB
http://www.newegg.com/Product/Prod [...] 6820144455

CASE + PSU
http://www.newegg.com/Product/Prod [...] 6811129071

Or any of these cases
http://www.newegg.com/Product/Prod [...] 6811146061
http://www.amazon.com/Cooler-Maste [...] B001TUYTZ2

With this PSU - Cheap, good quality
http://www.newegg.com/Product/Prod [...] 6817815007

^ The main reason why I wont go with that board is that I would anytime go with a REAL CPU,...

hi, i'm planning a simular config as well
but i'm worried about some pci-e issues i've been reading at the newegg.com
reviews page for the ASUS AT5IONT-I
i do have a planned config using the asus model (mobo looks alot more interesting than the zotac one does)

tempting mobo but it's not 525 series atom, it's 330 series

I was simply finding a comparative board to the OP question about using the Zotac IonITX F-E which is Atom N330