What would be optimal settings for a Windows 7 VirtualBox VM running on a Macbook Pro?

I am having a hard time coming up with decent performing settings to run my Win7 64-bit VirtualBox VM on my brand new Macbook pro. I've given it 2G memory (out of my 8G total), tried what feels like all combinations of motherboard and processor settings, and yet this VM still runs as slow as a dog. I've been googling all over and trying what I've found, but most of the recommendations do not seem to come from someone actually running a Win7 VirtualBox VM on a MBP. Does anyone have a combination of settings that actually is being used and works well? Does 32-bit Win7 work better maybe?

Specifics: I have a brand new Macbook Pro w/ OSX 10.6.7, 2Ghz Intel quad core, 8G Memory, 500G hard drive, 15" model. VirtualBox is 4.0.6. Windows 7 Professional.

Solution 1:

Well, I don't know what I did wrong to begin with, but I deleted the VM and started over with 100% defaults except that I set memory to 2G, harddrive to 60G, and 32MB video memory. Now it's working great, feels as fast as any other Win7 machine I've tried.

Solution 2:

Try giving Windows 7 only one processor. I've heard that multiple processors under Virtual Box can sometimes cause problems.

Also, more details of your exact configuration would help tremendously in trying to find out what is going wrong.