Well the first thing Id mention is that you seem to be building a gaming box and with only 2 boards in SLI, the 1366 platform is a bit gimped. Two 580's will certainly show a difference at x16 x16 but you can get that on the 1155 platform. Going for quad SLI, OK, stick w/ 1366 but two boards + an optional 3rd in dedicated PhysX duty is the realm of 1155.....even if ya want x16 x16 as all ya need is a NF200 chip on the board.
With twin 580's I'd grab the Asus Revolution and an i7-2600 (x16 x16)
http://www.tweaktown.com/reviews/3795/asus_p8p67_ws_revolution_intel_p67_express_motherboard/index.html
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131714&cm_re=WS_Revolutioin-_-13-131-714-_-Product
With twin 580's + a dedicated PhysX card, I'd grab the Asus Maximus IV Extreme and an i7-2600 (x16 x16 x8)
Either of those will be faster than any of the combos you listed ..... not in 3D rendering, movie editing, huge spreadsheets / databases, but in gaming the 1155 is king at this point.
Another thing ya might consider is that the factory OC'd 560 Ti's perform very close to the 570's. Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game) for the various options (single card / SL or CF) are tabulated below. In this table, for example, the 6850 gets 371 fps total in those games as single card, 634 in SLI and costs $0.42 per frame as a single card and $0.49 n SLI
6850 (371/634) $0.42 - $0.49
6950 (479/751) $0.51 - $0.65
560 Ti (455/792) $0.53 - $0.61
6970 (526/825) $0.64 - $0.81
560 Ti - 900 Mhz (495/862) $0.43 - $0.50
570 (524/873) $0.64 - $0.77
580 (616/953) $0.81 - $1.05
6990 (762/903) $0.95 - $1.61
590 (881/982) $0.79 - $1.43
The 560 can be OC'd to 1000 Mhz per the many published reviews .... I'll be taking a shot at it tomorrow .... expecting (535 / 932 performance if scaling holds.
The H70 is nothing to get excited about. Note that the 1155 CPU's simply are not limited by heat. BMR writes:
I think the Silver Arrow represents the ultimate air cooler than can be built and still fit within the constraints of an ATX motherboard and a standard computer case......
It's almost ironic that coolers like this are becoming available just as processors transition to designs that may ultimately render them unnecessary; even overclocked to 5GHz, an Intel Sandy Bridge 2600K doesn't need anywhere near this level of cooling. Still, it wouldn't hurt, and as I noted earlier, there are still CPUs out there that can benefit from it.
With regard to the H70, it really is not that great a performer .... with the same fans, it gets thrashed by the much cheaper Antec 620 (note the 620 as well as the H50 and H70 are OEM'd by Asetek, but the Antec has some improvements not available on either the Corsair or Asetek's own models).
Ya really don't need anything better than the Scythe Mugen 2
http://www.newegg.com/Product/Product.aspx?Item=N82E16835185142&Tpk=scmg%202100
Ya want the top dog .... 3rd fan can be added .... but as said above, heat is not gonna be the issue here.
http://www.frozencpu.com/products/11676/cpu-tri-77/Thermalright_Silver_Arrow_Dual_160mm_x_140mm_Fan_Universal_CPU_Cooler_Sockets_775_1156_1366_AM2_AM2_AM3.html
I won't recommend any of the self contained water units (H50/H70/620) cause in multi SLI configurations, these things hit the GFX card in the PCI-E No. 1 slot..... yes
Been There / Done That, shipped it back.
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=694&Itemid=62&limit=1&limitstart=4
I have built twin SLI systems in both the DF-85 and HAF-X and the DF is the easier build and I prefer the DF's feature set. But cases are most often an aesthetic choice so buy what ya like. Of late most builds I'm doing contain twin 900 Mhz 560 Ti's. In the DF-85 I use the CP-850 .
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=142
[The CP-850] is completely unmatched by any ATX unit on the market I can think of. You'd have to spend twice as much as this thing costs to find the next best thing, performance wise.
The XFX Black 850 (can get away w/ 750) is the best choice for the HAF-X. With the 580's, you're gonna want a 1,000 watter. The Corsaie AX and HX series are all capable of handling those and get 10,0 performance ratings at jonnyguru .... as does thr XFX Black and CP-850.
With the Vertex 3 hitting the shelves, you don't wanna invest in the older tech Vertex 2
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227706