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.