If i choose the Fractal 304, i what ways does it limit the PSU? Is it unable to hold a full ATX PSU, or is it the cooling that is a limiting factor?
The Node 304 can use both SFX or ATX PSUs, but given the expected power draw it isn't advisable to use any SFX PSU, noise-wise: and as a matter of fact I was referring to ATX PSUs only, talking about the Node 304.
Being that PSU placed transversally right after the front panel, the limiting factor is the PSU length: with long (I guess more than 220mm) graphic cards, it can't fit PSUs much longer than the standard ATX one (140mm). So basically you're limited to a PSU long as much as 140-150mm, with the possible exception of some fixed cabling 160mm ones (like the BeQuiet E10 400W, or even the Seasonic S12G), but in that case it will be a really thought fit, if any, so if you're not comfortable building by yourself your own rig, it isn't likely advisable (even because, with a fixed cabling PSU, you have to route ALL the PSU's cables inside the enclosure).
Among the available PSUs, the most sensible options (given your power requirement) are currently the Corsair CS-550M, the Cooler Master V550S-M and the Cooler Master G550M.
They are rather quiet, but they cannot match the Super Flower 500 we talked about.
And was the Fractal 304 unable to hold the Super Flower 500 (im not sure what you mean)? And what does Smaller footprint mean?
No, that Super Flower PSU won't fit: it's 170mm long plus the modular cable connectors, so just too much to fit with your graphic card (which should be around 260mm long).
Smaller footprint means a lower occupied area/space (the Node should be 37cm deep x 25cm wide, while the Elite 40cm deep x 24cm wide, so slightly larger, and both will occupy a much lower space than any mATX tower like the Silencio 352).
Hmm, as I understand it, i could go with the CM 130, but i should not get the build MM-vision proposes.
I meant that you can opt for the Elite 130, making a different trade off than with the Node 304, but that you still can't have it built for you by them, as they don't offer all the suitable parts (mainly CPU, the case and the PSU): I've already listed some parts you may need.
Also, I would prefer getting an OC Mobo and the i5-4690K, in order to future-proof my build a bit more (as well as underclocking if i want to)
You don't need an OC mobo to underclock the CPU, but it may come in handy as it can stand much better the ambient heat, and it usually has a more refined UEFI to better control the fans.
Simply go for a mATX build, as cooling will be easier and i can get dampend cases.
Dampened cases are more a marketing gimnick than an effective solution: as a matter of fact to be really effective at absorbing noise the noise linen/damping should be several centimeters thick (check the SPCR hemi-anechoic chamber building process), and not just a few millimeters.
In that build, i can choose either a mITX or mATX mobo, depending on me wanting to go for a mITX case in the future.
I should still consider another PSU than Seasonic, and i should also look into better cooling than Scythe Shuriken.
Mostly correct: I would add that if you're building it by yourself, it should be much more easier (not "easy" tout court, but significantly easier than building inside the very cramped space either of a Node 304, or of an Elite 130).
In any case, I should also choose a 5x00 rpm 2.5" HDD if I decide getting one, as they don't make as much noise.
Up to 1Tb it may be true (for instance a WD10JFCX is among the quietest drives you can buy).
But if you need a 2TB drive (or larger), a 3.5" Western Digital Caviar Green would be likely quieter than any 2.5" counterpart.
I might cook up a table with the different options for your comments, when i get from work
I really appriciate the feedback.