HTPC question (conversion)

[nonewsgoodnews]

I'm in the process building a new windows 8 computer but I want to convert my current computer into a htpc.
My current system is a phenom II x3 710 with a Gigabyte GA-MA78GM-US2H. 4 gigs of ram and a caviar black hard drive.

I currently have a 400w corsair power supply on this pc. I want to know if I could move all of these parts into this case:
http://www.amazon.com/MI-008-Tower-Black-Chassis-Supply/dp/B001H0BA24/ref=sr_1_4?s=electronics&ie=UTF8&qid=1350261325&sr=1-4&keywords=htpc+case

It has a 250w power supply. Would that be enough?

 

[Wolfshadw]

Sorry, but your current system has a MicroATX motherboard while the new case will only accept an ITX motherboard. Your old components will not physically fit within the case.

-Wolf sends

 

[nonewsgoodnews]

Didnt even notice that! Thanks.
I found this one:
http://www.amazon.com/Black-ATX12V-Desktp-Hidden-Covers/dp/B000FIQBNW/ref=sr_1_2?ie=UTF8&qid=1350263765&sr=8-2&keywords=htpc+case

I could go with that as its micro atx. My concern is power.
Anyone know of a cheap case where I could use my current full sized PSU?

 

[Wolfshadw]

Looking at PCPartPicker, this Silverstone Milo ML038 for $60 is about the best I was able to find on short notice.

-Wolf sends

 

[Dougie Fresh]

nMediaPC makes nice microATX HTPC cases:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811204030
http://www.newegg.com/Product/Product.aspx?Item=N82E16811204035
http://www.newegg.com/Product/Product.aspx?Item=N82E16811204042

 

[Wolfshadw]

I'd also recommend NMediaPC HTPC cases (I'm using an older 200BA case), but I tried to keep the cost as cheap as I could.

-Wolf sends