Hello and thank you for your time and help.
I'm preparing all the ingredients for my first self-built PC. No matter how much I read, there is always something new around the corner

. But it looks like I'm getting somewhere.
At the moment, my motherboard of choice for the project is Gigabyte GA X58A UD-5 coupled with an i7 950 processor. The GPU shifts between Radeon HD6870 and nVIDIA GTX470 (but looks like the latter: I got a good offer on Gigabyte's O.C. version). I'm not planning to go into SLI or Crossfire at the moment. The HDD should be Western Digital Caviar Black 1 TB (maybe in the future, SSD for OS and a second HDD for space). I intend to get a BluRay reader/DVD reader-recorder (very likely LG), multicard reader, bluetooth connector (via USB, I guess).
Still in doubt about the case, I was thinking of Thermaltake V4, or V6, Black edition (plus 3 nox knik 12" fans, or something like that), Thtk element G, or Thtk element S (always fond of this one); maybe NZXT Phantom (would it be a little large?, but then what a design!). Comments?
So, if there is room enough, why not use the Noctua NH-D14 (one of the best among the best, but LARGE), or the NH-C12P SE14 (to help cool places around CPU's socket). Advices on this choice?
About Power source, the point is how much do I really need? I know that with a 1000W everything'll be powered enough, but seriously... Remember the "Shrek" first film, when after rescuing princess Fiona they get back and get the first glance at Lord Farquaad's towering castle? I need something adequate for this platform, not something to compensate errr... Well, if you remember Donkey's speech, you get the picture. The thing is: 500, 550, 600, 650, 700, 750 watts? Till I met GTX470 (specially Gigabyte's overclocks) 600W seemed more than enough. But with all its demands and CPU/case fans cooling... And also: if in 1-2 years time I try SLI, wich?
And finally, I would like to use, with this CPU and MoBo, a DDR3 1600 memory kit. But I haven't found a compatibility list or something like it, and I am, well, yes, afraid of making some stupid mistake on this. So if the DDR3 1600 is fine I would appreciate hints on volts (1.5 v, 1.65 v, 1.9 v and so on, are SO different, or even some voltages are impossible to use with my intended build? Wich are acceptable?) and timings: CL9, CL8,... Please, try not to laugh too loud, I'm a real newbie but promise to do my best.
If you made it this far, your effort is greatly appreciated. This is my first post and thread here and, being spanish, I hope you could get through understanding at least part of my needs... Help! and a very big
THANK YOU.