I'm not sure that the i7-2600 CPU is really necessary, and it's quite costly for what it is. You'd probably be ok with the i5-2500, which is only ~$210, which saves you $90 on the CPU already.
If you're doing any sort of photo work, the onboard video chipset won't do what you need it to. It's just not powerful enough.
OCZ RAM isn't the most recommended on these forums, and OCZ announced that they are moving out of the memory business, so if it dies in a few years you may be out of luck.
I personally wouldn't recommend or own a Seagate hard drive. The Samsung F3 drives are great and quick. Hitachi also makes good ones (I have one that I've used for 2 years without a hitch).
You could also save on a case; Lian Li cases are made for enthusiasts, and tend to be expensive.
So here's what I would recommend:
CPU - Intel i5-2500 ($210) -
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115073
It's still a quad core and quite fast. You don't need the 2500K, because that has an unlocked multiplier for overclocking, and is $15 more.
CPU Cooler - Cooler Master Hyper 212+ ($27) -
http://www.amazon.com/Cooler-Master-RR-B10-212P-G1-Universal-Heat-Pipe/dp/B002G1YPH0/ref=sr_1_1?ie=UTF8&s=electronics&qid=1295838767&sr=8-1
One of the best coolers out there, and it's less than $30. I recommend getting it from Amazon, because the shipping is free as opposed to newegg.
Motherboard - ASUS P8H67-M ($100) -
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131690
Asus is a good manufacturer, and this has everything necessary.
Memory - Mushkin Silverline DDR3-1333 ($40) -
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226092
One of the better manufacturers, comes with heatsinks, and is cheap.
Hard Drive - Samsung F3 1TB ($65) -
http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185&cm_re=samsung_f3-_-22-152-185-_-Product
This is probably the most recommended hard drive on these forums. I personally am comfortable with Hitachi, and newegg has a 1TB Hitachi for $10 less than this Samsung that I bought.
Video Card - Asus GTX 460 768MB ($150 - $20 MIR) -
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121390
I'm not sure if the GTS 450 will get the job done, but the GTX 460 is a good graphics card, and I think you should be able to get your work done with 768MB of video memory (we usually recommend the 1GB, but that tends to be for gamers or CAD users).
Power Supply - Corsair CX600 600W PSU ($65 - $20 MIR) -
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139019
Corsair is one of the best manufacturers, and I would have recommended the 500W model, but after shipping, this one is cheaper
Case - Antec 300 ($60) -
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042&cm_re=antec_300-_-11-129-042-_-Product
One of the best cases I've owned. It's not really flashy, simple, and very solid. It will come with 2 fans (top and rear), and you can add 2 more in the front and one on the side.
So the grand total is $718, which is ~$20 more than the combo, but you're also getting better parts and a dedicated graphics card.
With your budget, you could also put in a solid state to keep Windows and your photo programs on in order to boost your load times. It's not a necessity, but I just thought I'd mention it.