Here's Toms reviews of all 3 boards that your talking about:
http://www.overclock...al_p67_review/1
http://www.overclock...vision_review/1
http://www.overclock...7a-ud7_review/1
You should read them all and then go for the one you like the looks of the most but if it was my money I'd go for the P67A-UD7 as not only is it the cheapest but the only one with the performance award.
The difference between the HX and AX is that the HX is module but the AX is fully module. If you don't understand what I mean by that you should read these reviews too.
http://www.overclock..._750w_atx_psu/1
http://www.overclock...tx_psu_review/1
Also, where the HX has silver band [font="Arial, Helvetica, sans-serif"]80 PLUS Certification the AX has gold band.[/font]
[font="Arial, Helvetica, sans-serif"]Basicly the AX is better.[/font]
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[font="Arial, Helvetica, sans-serif"]Also when your looking for the MSI GTX 580, if you can aford to you should go for the lighting version instead of the standard version as the lighting gives you much more overclock ability. Here's the links if your not sure of the difference:[/font]
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http://eu.msi.com/pr...n-Frozr-II.html[/font]
http://eu.msi.com/pr...-Lightning.html
http://www.overclock...htning_review/9
Also one more thing that might help is this:
http://www.noctua.at...ts_id=34&lng=en
Its a list of memory modules that are compatable with the D-14 but bare in mind that its not a complete list.
I also agree that you should get 2x4GB sticks of memory and the fastest you can. Personally, unless you can find some 4GB sticks that can run at the 2133MHz that these motherboards support, than I would go for these
http://www.mushkin.c...ack/996953.aspx If you go with the black Gigabyte board then I would probably get these anyway
Last thing, cases. The Raven looks like it takes after the F
[font="Verdana, sans-serif, FreeSans"]ortress in its design and the [/font][font="Verdana, sans-serif, FreeSans"]
Fortress is one of the best cases these is for airflow so I would expect the Raven to take after this and would therefore be what I'd choose. You could also get a really good black and gold theme going.[/font]
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Hope this all helps.[/font]