SLI MSI-560 vs. SLI 580? Please help make sense of this.

Good evening everyone, I'm building my new "gaming" computer and was hoping to receive some wisdom from the forums on a conundrum I ran across.

Now, we all know that the EVGA 580s are beasts, however, that does come with a price. (Currently: $480.00 with Rebate.)
I ran across a Video on Newegg's YouTube channel that caught my eye, according to some of these benchmarks, not only does SLId 560s compete vs. the 580s, they in one instance beat them. Now while I'm aware that it probably was faulted on the new drivers it still holds some merit to the power of the 560s. (560s Currently Priced: $230.00 with Rebate).

Video URL:

So for the price of 1 580s, I can have 2 560's in SLI.
Looking at my build, what do you think would be the best route?

[Build: 2011 Gaming PC]
OS: Win-7 64bit - Free (Already owned)
CPU: i7-2600k (Plan to OC to 4.6) - $315.00
MOBO: ASUS P8Z68-V PRO - $210.00
RAM: G.SKILL Ripjaws X Series 8GB - $80.00
Graphics Card: ??????????????
Hard Drive: SAMSUNG Spinpoint F3 1TB - $60.00
-SSD: OCZ Vertex 2 50GB (Boot Drive) - $110.00
Case: NZXT Phantom White - $120.00 (on a side note, this Case is freaking beautiful and effective)
Power Supply: LEPA G900-MA 900W Gold Cert Modular - $180.00
Cooling: COOLER MASTER Hyper 212 Plus - $30.00
DVD Burner: ASUS 24X DVD Burner (ID#: N82E16827135204) - $20.00
What I plan to play/do with it.
Games: BFBC2/3 , GW2, SW:KotOR, TF2, SC2, L4D2
I also will be setting up a Projector (720p) on a 120" diagonal screen. This is where I think the 560s might be stretched.
It is a must that I be able to use this computer and game/watch movies on the Projector and a 1080p 30" TV


Long Story Short (tl;dr): If you plan on building a gaming PC while using a Projector (120") 720p / TV (30") 1080p / Monitor (22") 1080p 1920x1080. Would you rather have SLId 560s or 580s, keeping in mind you can have both 560s or 1 580, but upgrade to 2 580s in January.
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More about make sense this
  1. 2 560's will give you the same performance of 580,but they consume more power,run hotter and are more noisier.So my vote goes to 580(You can add another 580 later)
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