Need help with choosing some components

Hello to all.I have a certain problem that I need to attend to,before I go forward with the purchase of these components.

My current config that I wanna purchase is this:

Mobo: ASRock P67 Extreme 6 REV B3.

Processor: Intel Core i5 2500K 3.30GHz box.

GFX card: MSI GeForce GTX 560 Ti Hawk 1GB DDR5 256-bit.

RAM: Corsair Vengeance 8GB DDR3 1866MHz CL9 Dual channel kit.

Chasis: Cooler Master HAF 922 black.

Harddisk: SSD Intel 40GB SATA-II 320 series 2.5 inch

My problem is this.There are currently only 2 sites in Romania that I can order these products.I've been waiting for a discount for the past few months,but that didn't happen.Now the Extreme 6 mobo is removed from the list,but it is available on the other site and it has a higher price however.

I have browsed for some other mobos Asrock and I have found half price and promotion is this: ASRock P67 Pro3 rev. B3.I saw a few positive reviews on it.Is it good for my current setup? Will it be able to handle it?

Same problem with the HDD,it's not available currently on the site and on the other one there is a retail version and a normal version.What is the
difference?

I'm planning to get the SSD to install win7 on it and store some default programs and some saved games that are usually stored in "my documents" folder.Is it big enough?

My budget is between 800-1000euros.That depends how much I can borrow from a certain someone.The only thing that I want to keep is my old 120gb hdd which I have currently installed windows XP on it and my 500gb one where I store games and data.

Thank you in advance for the replies.

PS: I'm not a tech savvy so I don't need detailed explanations.