www or no www that is the question

Which is better for SEO purposes, right now my non www version of the page is coming in at PR 4, the www version is a steaming hot PR3 . I'd like to either have the whole entire site as www or no www in the address.

The only question is which is better for SEO, the www version of the site, or the non www version

Thanks

www. is deprecated.

No www, use a subdomain for your board. For your site's homepage (or board if that is your site's homepage) you can leave the www out, but make sure www redirects to http://

Having said that, most of the big sites still use http://www , I keep using it for my homepage for two reasons:

1. For SEO, it doesn't really matter.
2. People are used to www, so why change things and confuse them.

I just redirect http://domain.com to http://www.domain.com means it stays consistant and people can use which ever they like. I guess I could switch it round, but I prefer having the www there oddly enough.

FYI Google Webmaster Tools allows you to specify if your site should be indexed with our without the www as well.