There's nothing pollsters like more than a big election. It's a chance for them to test the degree of accuracy of their understanding of public opinion.

Personally, I don't really mind who's going to be the next President of the United States - as long as it's Obama - but I do have a real interest in finding out which poll is going to come the closest at predicting the margin of victory.

This year, my money's on the Harris Poll - they've got a great track record in this - and I have to say that they're suggesting a landslide in favour of Obama.

While other pollsters broadly agree on the outcome - the difference in the size of Obama's victory is up for much debate.

Which of the polls below do you reckon will come the closest? (Competition ends just before final results announced!!)

Pre-election final polls - scores on the doors:

• Harris: 52% - 44% in favour of Obama. (Margin 8%)
• Gallup: 53% - 40% in favour of Obama. (Margin 13%)
• Rasmussen: 52% - 46% in favour of Obama. (Margin 6%)
• Washington Post: 54% - 43% in favour of Obama. (Margin 11%)
• Ipsos: 48% - 43% in favour of Obama. (Margin 5%)