I believe this is the best configuration for me at the best price at this moment. I did not place the order yet, so i'm open for any sugestions

Processor: Intel Core 2 Quad Q9450 - € 239,-
The Core 2 Quad Q9450 has 4 Cores at 2,66GHz, a 1333MHz fsb and 12MB L2-cachememory. The Q9550 is only 166MHz faster but also twice as expensive so I chose for the first.
Motherboard: Asus P5Q Deluxe - € 144,50
Instead of the Asus P5K, based on the P35-chipset, the Asus P5Q Deluxe is based on the P45-chipset. Not real spectacular advantages but it is more prepared for the future. The reason I chose the Deluxe version is because of the extra PCI-Express slot (you trade in, one normal PCI compared with the P5Q) and the possibillity for 16 phase procossor power which claimes to give better performance (?)
since I not intend to use SLI or Crossfire, there's no need for a X48 motherboard.
If I look at the configuration of the mainboard (P5Q), I doubt that both my SCOPE (6 DSP) cards will fit.
can anyoneconfirm this?
Memory: Corsair TWIN2X4096-8500C5DF,4096MB, 1066MHz - € 106,87
Never use the “auto” setting in the BIOS always set them manual according to the manual of the memory modules.
Put them on CAS 5-5-5-12 2t 2,1 volt at 1066 mhz.
With slightly overgeclocked Q9450
or
OCZ DDR2 PC2-8500 Reaper HPC Edition (2x 2GB)
Video: Asus Radeon HD 3650 - € 49,90
For music production, no heavy video card is needed. I chose for the ASUS Radeon HD3650. The card is passively cooled so no fans which can produce any noise. It's capable of rendering a few 3d objects and the user Aero interface of Vista is also no problem. This card has 2 DVI connectors for a dual screen setup.
Harddisc: 2 x Samsung Spinpoint F1 640GB - € 60,95 (2x)
Instead of the Samsung Spinpoint F1 750GB-i chose for two 640GB-models. The reason is these use only two platters with a higher density. This means better performance and and lower noiseproduction. 2 Harddiscs in raid 0 (mirror) will reduce the loadingtimes and give better safety since data is written to 2 discs simultaneously. So, in case one disc crashes you still have the data on the other
Don't use the orange connections on the mainboard, just use port 1 and 2 of the ICH10R controller and put the discs in RAID 0
Cpu-cooler: OCZ Vendetta 2 CPU Cooler | OCZTVEND2 - € 35,- -
According to the most tests a very compact, low noise and good cooler.
Dvd-burner: Lite-On LH-20A1S (20x) - € 17,50
According the most test results I found, the GH20NS10 is the best. Also, my overall experience with Lite-On is good. It is a SATA Model and writes at 20x speed.
Behuizing: Antec 3U25ATX450XR-2 – EC 19” 3U - € 94,10
This 19” case has only takes only 3 units and still can house the PCI cards. It has a 450W ATX12V v2.0 power supply, and there will fit 4 3,5” discdrives in. My experience with antec is pretty good.
http://www.antec.com/ec/productDetails.php?ProdID=03207