For a while now I've been toying with the idea of building a SFF Steam box to put under my TV. Pair a Logitech K400 and a wireless 360 controller with it and I'll just sit out the next console generation. I've gone through mkenyon's SFF guide (which is a fantastic guide, thanks for putting it together). I've also kept an eye on the Alienware X51 and any deals that come along for it.
I took a first crack at a SFF build on New Egg. This pretty well represents the minimum performance level I'd be willing to accept. Should run just about everything I throw at it at 1080p, top or near top settings, and at a smooth frame rate. Keep in mind I didn't take a lot of time to pick over alternatives for each individual component. A lot come right from mkenyon's guide. I was just trying to get a ballpark estimate for what I wanted.
Case Cooler Master 120 - $50
CPU I5 3570k - $220
MB Gigabyte GA-Z77N - $120
RAM GSkill Ripjaws 8GB - $69
GPU Gigabyte 660 TI - $300
HD WD Blue 1TB - $75
Optical Blu Ray Drive - $80
PSU SeaSonic S12II 520 - $65
Total $979
For $1050, I can get basically the same machine in a X51. The only difference is the video card, a 660 vs a 660 TI. But my understanding is that the 660 in the X51 isn't that far off from a TI. So nearly identical machines coming in at only a $70 difference. That doesn't seem like a very big difference for something I build vs something I pay someone to build for me.
Help me out GAF! Am I missing something? Are there more dollars to be trimmed from my SFF build while still coming away with a killer console replacement?