Please take a look of this set up!!!!Any advice is welcome

Ok Masters, what do you think about this set up:
-GIGABYTE GA-H55M-UD2H LGA 1156 Intel H55 HDMI Micro ATX Intel Motherboard
http://www.newegg.ca/Product/Product.as ... 6813128421
-Intel Core i7-870 Lynnfield 2.93GHz 8MB L3 Cache LGA 1156 95W Quad-Core Processor BX80605I7870
http://www.newegg.ca/Product/Product.as ... 6819115213
-G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL
http://www.newegg.ca/Product/Product.as ... 6820231277
-Sony Optiarc Black 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA CD/DVD Burner - OEM
http://www.newegg.ca/Product/Product.as ... 6827118039
-SAPPHIRE 100293L Radeon HD 5570 1GB 128-bit DDR3 PCI Express 2.1 x16 HDCP Ready Low Profile Ready Video Card
http://www.newegg.ca/Product/Product.as ... 6814102874

Another option for case and PSU
-COOLER MASTER HAF 912 RC-912-KKN1 Black SECC/ ABS Plastic ATX Mid Tower Computer Case
http://www.newegg.ca/Product/Product.as ... 6811119233
-CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply
http://www.newegg.ca/Product/Product.as ... 6817139006

Also, I'll really appreciate an advice about the cpu i5 or i7, I want this computer for audio work.
This configuration should be work, right?
Thank you again for your great help

Couple of questions/comments.
The video card, not sure it that is supported (is it based on a reference design, ie 2 dvi, one hdmi, and one displayport), but I could be totally wrong.
The corsair power supply is very nice, but with the system you're spec'ng out, thats way way more power then you'll need, unless you plan to overclock the heck out of the system. I have a i7-860 with a msi p55-gd65, 3 hd, 2 dvd burners, and a 5750 and a 6 yr old 550w power supply is more then enough. But I don't overclock though...

When it comes to the i5 vs the i7, the benefits of the i7 will be negated if the application you plan on using is not multi-threaded, which will make it more dependent on clock speed then anything else. Which always makes the i5 - i7 argument fun, gotta watch the what the processors will automatically scale up to for single, double, and triple threaded apps.

Also, what I will say, in terms of the power supply, watch the efficiency numbers, getting a large power supply like that for a little power sipping system, could be counter productive. Power supplies that have 80 plus certifications are only rated at 20%, 50% and 100%, meaning a good rule of thumb is to try and get you're systems idle power requirements to be closer to the 20%, going to far below that the efficiency starts to dip, and depending on the quality of the psu. I recently went with a seasonic x-650, mainly due to the discounts that newegg had. You may want to look at the seasonic s12 psu series, or an antec new tp series, may be a few bucks cheaper, and probably a bit more efficient then the old corsair. Just don't see the need to pay more upfront, and also on the back end, power bill that is.

Anyways, good luck

Thanks for your advice, I was thinking in this PSU:
-http://www.newegg.ca/Product/Product.aspx?Item=N82E16817371020
Antec TruePower New TP-550 550W Continuous Power ATX12V V2.3 / EPS12V V2.91 SLI Certified CrossFire Ready 80 PLUS BRONZE Certified Active PFC "compatible with Core i7/Core i5" Power Supply
-This motherboard:
GIGABYTE GA-H55N-USB3
and this video card:
-Sapphire ATI Radeon HD5770 PCI-E 1G DDR5 HD/DP/2DVI
What do you think?
Please any advice is awesome for me