If all this is is playing media, then some of this stuff is overkill.
For one, the case I'm finding too big and too inconvenient... I don't know why SilverStone thought it was a good idea to have the front panel covered and with the option of a lock in an HTPC case. You won't need a GPU, Intel's chips handle video decoding very well. The power supply is overkill. The most I could expect this system to drawn is no more than 100W on a bad day.
If i dont use a GPU, then yes the power supply is overkill, but i would rather have it be overkill then not enough.
Other things of note... I'd probably get another SSD and something of smaller size. 60/64GB is enough for Windows and your media playing applications. The hard dive is good, but you won't need to RAID it, unless this is meant to be a backup solution in which case I would recommend that for another build, not this one.
For the SSD, i picked the one i had listed because it wasnt that much more expensive then one that was half the capacity.
It was only going to back its self up, (i have a home server that could do that) if i use the home server, then i will probably only use 1 HDD in the HTPC.