Shak said:I suggest you wait out for about few more months...
Get a new laptop/desktop when windows 8 launches officially worldwide and then buy a Windows 7 Machine for Cheap price because the price will drop.
Minium memory you'll get is 4 GB of (ram). and i3 (or better) processor which are all quad. (per say).
And if you get something with more than 4GB of RAM, then make sure you get 64-bit Windows 7 and not the 32-bit version or you are wasting your money.
32-bit Windows can only see a max of about 3.5GB.