For organic purposes, would it be better to submit all my articles to EZA, GoArticles and Articlebase - or should I spread it out to other article submission sites as well - even though they take longer to approve and don't get indexed as quickly by G?
Personally, I find those to be sufficient. If you want to do more, look into Free Traffic System which will give you quite a bit of IP diversity. I think someone has a study of the auto submitters somewhere on DP.
It is best to concentrate on those or any other sites that give good results (Traffic, better SERP rankings etc) instead of trying to submit to every article directory out there.
that depends on how many articles you want to submit. if a few then thats fine. but if you submit articles on a regular basis and would be submitting articles on a continous basis, then i suggest you expand your reach and use other article directories as well
I do all 3 EZA, GoArticles and Articlebase Ezine takes forever to approve, GO is instant approveal and allows a lot off link (3 in article) Article base i like the most one u are out of article sandbox but they are no follow which sucks