i want to upgrade my Laptop to Windows 7

at the moment it is Vista

I have a Toshiba Qosmio X300
-> Intel Duo Core P8400 2,26 Ghz
-> Nvidia 9700 GTS ( 512MB)
-> 4GB Ram
My question is
is it helpful with this Configuration to make an upgrade to Win7 64bit
For booth opportunites
32bit and 64bit
Toshiba supports all nessacery drivers
For Win7 32bit i must do an upgrade
but if i change to 64bit i must completely reinstall the computer
On the computer only runs resolume
Does it help resolume to make an upgrade to 64bit
or is it with resolume on 32bit the same performance
Regards
THH
I understand my english, i hope you too