<$1000 First Time Gaming Build

[AMD X6850]

Approximate Purchase Date: Within 2 weeks.

Budget Range: $1000 (in Australian shops, which are generally more expensive than Newegg)

System Usage from Most to Least Important: Gaming (latest games with at least medium settings), Some Transcoding

Parts Not Required: Mouse, Monitor, Speakers

Preferred Website(s) for Parts: msy.com.au and other local shops

Country of Origin: Australia (NSW)

Overclocking: Maybe

SLI or Crossfire: No

Monitor Resolution: 1680x1050 (will upgrade to 1920x1080 later)

Already have most of the build figured out, just a few parts that are annoying me which I need help with.
I will link to Newegg, because they have the best format (pictures, specifications and feedback), even though I won't be able to buy from there. If you are making recommendations, please also link to Newegg, because if it is a good product I won't mind hunting around for it locally. However, the price listed next to each item is the one that I will be buying it at.

Processor
Intel Core i5-2500 Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) - $218
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115073&Tpk=Intel%20Core%20i5-2500

Will the 2500 make much of a difference over the 2400 for my usage?
The 2400 is $15 cheaper. The 2500k is out of my range at the moment, so the only overclocking I will be able to do is the 4x multiplier change (maximum 3.8 Ghz with 4 cores), which I don't mind because overclocking is not important to me.


Optical Drive
LG GH22-NS50 SATA Black DVD-RW - $35
http://www.newegg.com/Product/Product.aspx?Item=N82E16827136216&cm_re=LG_Black_DVD-RW-_-27-136-216-_-Product

Case
Thermaltake M9 VI1000BWS - $79
http://www.newegg.com/Product/Product.aspx?Item=N82E16811133058&cm_re=Thermaltake_m9-_-11-133-058-_-Product

Alternate Case (if the above is out of stock): Antec 300 - $55
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042&cm_re=Antec_300-_-11-129-042-_-Product

Graphics Card
GIGABYTE Radeon HD 6850 (GV-R685OC-1GD) - $186
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125353&Tpk=Gigabyte%206850

Alternate Graphics Card (if above is out of stock): HIS Radeon HD 6850 (H685F1GD) - $179
http://www.newegg.com/Product/Product.aspx?Item=N82E16814161348&cm_re=HIS_6850-_-14-161-348-_-Product

RAM/Memory
G.SKILL Ripjaws Series 4GB (2 x 2GB) DDR3 1333 (F3-10666CL9D-4GBRL) - $54
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231274

Does the heatsink/spreader (whatever its called ) make a difference?
Say, would it affect my build if I dropped down to this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231396

Hard Drive
SAMSUNG Spinpoint F3 HD103SJ 1TB 7200RPM SATA - $58
http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185&cm_re=Spinpoint_F3-_-22-152-185-_-Product

Alternate Hard Drive (if above is out of stock): Western Digital Caviar Green 1TB 5400 RPM - $60
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136490&cm_re=WD10EARS-_-22-136-490-_-Product

Power Supply
Antec EarthWatts EA-650 650W - $99
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371015

Overkill for the current build I know but its good having it if I ever upgrade to some crazy graphics card.

Motherboard
Main part that is annoying me. Following the recall and release of the B3 boards, stock is still quite low of most B3 motherboards.
I was leaning towards this one:
ASRock P67 PRO3 (B3) - $153
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157230&Tpk=ASRock%20P67%20Pro3
Unfortunately, it is indefinitely out of stock in all of the local stores
I cannot find an equivalent board at a similar price locally, so I was thinking of dropping down to a H67 board if there is still no stock by next week.
What is a good H67 board which is fairly cheap (under $130 on Newegg)?

Will pick up a keyboard & Windows 7 Home Premium 64Bit ($99) at some point

Total: $981

Other than that, are there any bad items in my build or anything that might not be compatible?
Thanks for all help in advance

EDIT: Questions bolded cos they didn't stand out.

 

[Martin9630]

Hi, good build you've got there, not too sure about the RAM but no a heatsink won't really do much difference, but the best budget heatsink I'd recommend is the CM Hyper 212+ costs $40 in Australia.

 

[AMD X6850]

Best answer selected by AMD X6850.