Drupal Community Portal

Hi I currently have a reseller account with HostGator and I have loved them until this point. All of my sites started choking and getting slow. I know it isn't drupal or the way my sites are setup because the sites have worked fine for months until now. I am just sick of them and ready to transfer.
Could someone recommend a good Drupal Host that does reseller accounts that I can't go wrong with?
I was looking into BlueHost and JustHost. They seem like two of the top companies.