IMHO that question can't be answered so easily, there is no "the best" submitter, since everybody has other preferences. Chameleonsubmitter is very easy to use, Advancedsubmitter requires some upfront learning and Dreamsubmitter requires even more time before you feel safe with the program. But learning time always pays of in better results, so it depends how much time you'd like to spend with submitting, and how important it is for your monthly income.
-DreamSubmitter is a great autosubmitter
-Advancedsubmitter has it's advantages within manual submission
-Chameleon doesn't require any database maintenance
-AdvancedSubmitter can submit to LinkLists and Linkdumps, Boards, Blogs, etc. too
-etc., etc.
All three tools are established, so in the end it just depends on personal opinions and preferences
