Does it make any difference? Hosting: GoDaddy Shared IP with 500 unknown websites (some of them might be porn, casino or other bad neighborhood sites) or Hosting: GoDaddy Dedicated IP assigned specifically for your own site, no other sites under your IP Does it make any difference in SEO?
it's been proven not to matter http://www.mattcutts.com/blog/myth-busting-virtual-hosts-vs-dedicated-ip-addresses/
Getting links from different class c links will give you more juice for ranking. And it looks for more natural than getting most of your links from one shared IP.