Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
All the Pentium Ds are EM64T.
All the Pentium 600 series as well
Any of the Pentium 500 series that end in '1' (ie 571, 541, ...).
All of the Nocona core Xeons and later.
Unless you only upgrade CPUs once every three or four years, or you have a very pressing need for 64 bit right now (which the vast majority of people don't, especially considering the huge driver headaches XP64 offers up) then don't chase 64 bit as a must have feature.
32 bit CPUs perform just as well as 64 bit in 99% of the situations desktop users will encounter. It's one thing if you are planning on running a massive server and need 8 gigs of RAM, or you are using one of the rare scientific or heavily math intensive apps that actually benefit from 64 bit right now, but most people aren't.
That being said, now is not the best time to jump on any of the currently availible Intel 64 bit procs, or an Athlon64 or X2 for that matter. Intel's most attractive offering at the moment is the Core Duo, but limited desktop mobo support hurts it a bit. At the same time, both the A64s and the Core Duo are already under the looming shadow of Conroe, which will handily outperform both, will be availible in a couple months, and is 64 bit.