Just beware, the current limitation with the 64bit version is the lack of 64bit compatible NPAPI plugins. (And possibly more ram usage)
As far as I'm aware that's not a 64bit limitation, that's just chrome in general and once chrome version 45 hits later in the year NPAPI will no longer work at all, https://support.google.com/chrome/answer/6213033?hl=en-GB
Gone back to 32bit.
The 64bit was using more RAM than 32bit.
That will be the case with most if not all 64bit vs 32bit pieces of software.