I'm ordering a 27" iMac (3.4 ghz i7, 8gb ram 2tb hdd) . . . . I've read up on 64bit vs 32bit info and it still confuses me. . Will this be a 64 bit computer? If so, when I download 3rd party software for this iMac . . . and if given the option to download 32 bit or 64 bit version of the software, should I ALWAYS download the 64 bit version?? Thanks for answering what may be a "dumb question"