Yep, I do. To elaborate, or perhaps clarify, IMHO probably the biggest security advantage is using 64-bit plugins e.g. Java and Flash.
Utterly deluded.
64-bit just means two things :
(1) the ability to address more memory (which is pointless with plugins, since they shouldn't be using 32-bit's worth of RAM let alone more !)
(2) Perform 64-bit operations (i.e. do stuff quicker)
Its an architectural difference. That is all.
As for the security .... think of it like the difference between a terraced house and a mansion, or a mini and a porsche .... i.e. there is none, both are equally vulnerable to robbery and vandalism. The same goes for 32 vs 64 .... both are equally as vulnerable to ****ty coding.... don't believe me ? take a look at how many updates Microsoft have brought out for Windows 7/8 64-bit ... case closed.