Advice on new computer system

I'm considering buying a new computer system so I can use FSX fully out with all add ons.

Let me point out right away that I do intend to wait to later in the summer when haswell has been released

so I can give that a consideration-

From what I understand there is no point in waiting for faster CPU when it comes to FSX.

So is this upgrade package about the best than we can get for FSX ?

http://www.dustinhome.se/product/5010641364/dustin-uppgraderingspaket-intel-i5-3570k-s-1155/

Question if I use my current video card will my system be bottlenecked by it so the new CPU and RAM won't improve things very much?

Do you have any good advice for these components ?

PSU

Case

Cooling