nahh it's not that expensive, 64 bit processors and 32 bit processors and also they also share same mobo harddisk and the likes, price are the same but the only difference is the RAM, if you are enthusiast just go buy a higher ram for maximum speed, right now I'm using 64 bit win 7 with 4gb ram and it's really fast loading of GC and besides thare are programs like sandboxie that enables you to play two Grandchase in one computer, no need to use VMWARE, and vmware is way slower , right now I prefer win 7 64-bit for maximum performance and speed, (1 con for 64 bit, always find a compatible softwares for 64 bit because it,s hard to find unless you are very good in computer) Hehehe thats all folks!!!