Building New Comp - Power supply?

Hi Folks,
I've been upgrading my computer but one thing i am having trouble with is the power supply. I'm not really sure if what I have is sufficient. I've also tried a couple of power supply calculators but they just don't seem accurate. Here is my setup:

MoBo: MSI P6N SLI-FI nVIDIA nFORCE 650I CHIPSET ATX
Processor: Core 2 Duo e4300
Vid Card: ATI Radeon x1650xt
RAM: Corsair DDR2 PC2-4200
Extras: Samsung DVD/CDRW Combo Drive, DVD Drive, 2 HDD

My current power supply is only 350watts. I'm not sure what wattage I should go up to, or if it will have enough connectors for the setup. Any help you could throw my way would be great - Thanks

 

You could try this power supply wattage calculator, if you haven't already. It's supposedly pretty accurate, and you don't have to fill out every single option.
I'd say bump it up to a 450W+, but I really don't know for sure.