rvilkman :
Obviously you could go with water cooling to keep the noise down but that would eat up a lot of your budget just for getting the cooling down and you would be missing out on a lot of performance. So probably your best bet is indeed selecting quality components that run reasonably quiet.
I would go with Noctua Fans. They are quiet and move a lot of air.
Such as NF-S12B FLX - 120mm fan has 3 settings and the highest one is about ~18 Db while still moving a lot of air.
GPU's are often the noisiest component in your system. Looking at blender you will probably be looking at multiple GTX 580's to run your system and they do get hot so a lot of cooling is needed for them. The stock cooler options at full load from 100cm range go up to about 41db. Which obviously can be dampened by the case. However I would recommend getting ones with non reference heatsinks. Asus DirectCUII GTX580 is really quiet but it does take 3 slots, so you have to get a MB that is able to accomodate 2 of them with ease. ~$500 each for the GPU's
As for your case, the antec cases can be made quiet, but overall cooling might be better handled in Silverstone Raven 02 or Fortress FT02.
One possibility for a build:
Case: Silverstone Raven 02 $180
PSU: Corsair AX1200 80+ Gold $260
CPU: i7 2600k $315
CPU HSF: $80 ( not sure which is the best here, generally something sizeable with good fans gave a hefty budget for it anyway )
Memory: 4x4GB GSkill RipjawsX Cas9 1.5V 1600Mhz Memory $165
MB: Asus P8P67 WS Revolution $260
GPU: Asus DirectCUII GTX580 $500 x 2
DVD: Asus 24x DVD+/- RW
~$2300
Leaves about $200 bucks for a storage solution, and it should be pretty quiet as is.
Not sure if SSD was desired of if a reguar HDD will do the trick.
If you can find a nicer case that's good, but this would probably be decent as is.
Wow. Thanks for the thoughtful reply.
I looked at water cooling and using SSD as well but considered the price is too high as you pointed out.
I'm looking at the Asus/Nvidia solutions for several reasons. Nvidia has good drivers for linux, Blender 'likes' Nvidia better than AMD/ATI (something to do with Open Gl). In addition the new (still in development) render engine (Cycles) will use CUDA first, then be adapted to Open CL. The suffix 'Ti' would be a better card for me since the primary goal is to render ie. crunch numbers.
<cut/paste> For now I'm holding off on my CPU, Motherboard choice since AMD and Intel are both bringing out new products. When 8 cores are widely available I will make a choice. Since fans and CPU cooling can be purchased with @20db noise; I'm thinking that a new PSU might be the big noise maker. I'm also concerned that a quiet case may also be prone to overheating.
I noticed that the Antec P193v3 has a large side fan that blows directly on the Video cards and has a baffle/'muffler' covering this side port but I don't know how much case noise might escape through this hole. Front fans are muffled by the door. This extra dedicated cooling might help bring the heat/noise down on the GPU's.
My biggest concern now is that I may get all of my noise generating parts down to @20db only to hear my PSU loud and clear. I'm going for a kWatt+ PSU hoping that I will in fact draw a smaller % of it's full capacity to lessen noise.
Now I'm off to look at the case and PSU you suggested.
Thanks again,
Allan