Intel Atom N455: 64bit or not?

Hi everyone, here's my situation.

I have this win7 tablet that I just upgraded to win8. It has the Atom N455 that supports 64bit, 2gb memory and, for Xmas, upgraded it to a 120gb ssd.

However, now I have Windows 8 in 32bit. Should I reinstall to get it to 64bit? Is it worth doing with only 2gb ram and a mobile processor? I might consider getting a 4gb ram.

I just want some opinions on whether 64bit is worth the trouble on a tablet used mainly for office/videos/multitasking/web. And btw, is downloading win8 from the download assistant on a 64bit machine the only way to get a 64bit install?

Thanks in advance!
Season's greetings to all.

MC