AMD htpc for gaming

Haven't built a pc in a while so I'm looking for suggestions on the mobo/cpu component. The requirements are:

A) It's an AMD (mobo can be any brand)
B) It's for gaming
C) It'll be for an htpc (but I have no idea what that really entails... I'll probably just play games all day on it)

There's a combo right now of the following for around 280$ shipped:

-AMD Phenom II X4 920 2.8GHz Socket AM2+ 125W
-ASUS M4A79 Deluxe AM2+/AM2 AMD 790FX ATX AMD Motherboard
http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...

Looks pretty solid but the mobo seems like overkill. I'm gonna be using nvidia cards so the 4x crossfire is pretty pointless. The mobo is 140$ with the combo, which is what made it tempting. Any better suggestions on the mobo is highly appreciated. I'm pretty firm on the cpu unless someone wants to suggest something that games better and costs less than 150$.

I got my own religion for heatsinks and fans, so no recommendations are required there.


Thanks for reading, any comments are welcome.



Supplemental:

In case anyone is wondering, here are the other parts I've decided on for the pc:
-pair of 8800gt from another build (gave up because it wouldn't fit 2*hr-03gt into the tower)
-velociraptor 74/150/300 (probably raid0 a pair of 74s)
-2*2 gb of pc6400 ram from some brand if I don't already have some somewhere.
-pc power n cooling 750 watt (its shiny red!)
-cm 360 tower; it can lie flat down and doesn't cost much (like a cheap hooker). I took a look at real htpc cases and they were all $100+ for no good reason. They also didn't look like they would have any sort of airflow given their small size (besides the antec nsk2480 (wow, that just rolls off the keyboard... nsk2480... nsk2480...)). The cm360 looks cheap and I'll end up prying off that that crappy cm insignia using an even crappier cm fan blade, but it should get the job done.

This is replacing an e2200 with an 8800gt and other noname parts on an Antec Aria /w 300watt psu. It works fine but it runs slow (using some generic hd/ram so load times are awful) and hot (50c cpu/60c gpu when gaming). I'm too lazy to find a non-stock heatsink that will fit inside that tiny thing. The positioning of the cpu on the no-name mobo is pretty weak.

I never really intended it for gaming at all; I left it in my parents house until I bought an hdtv and wanted to fiddle with stuff (like installing new nvidia drivers which caused unfixable overscan issues)(system restore finally pays off). Framerates on it are actually quite good though. It probably just needs a faster hd and better airflow to make it "work", but we'll leave that to another day.