Hi, and welcome to JustAnswer! My name is XXXXX XXXXX X am excited to get started with you.So I can better assist you, I will need additional information. Do you want your external monitor to act as an extension? Or would you like it to mirror what is on your macbook pro?
An extension - I like to have lots of word and pdf documents up sise by side for editing of manuscripts
Ok, are you just connecting one monitor or multiple monitors
I already use a vag cable and apple connector to link up a single 24" monitor but I would like 1 or 2 more
Are your other monitors going to be VGA too or mini display?
If you haven't gotten your monitor yet, to add the 2nd monitor, you can use your Thunderbolt to VGA
Here is what you need http://store.apple.com/us/product/MB571Z/A/mini-displayport-to-dual-link-dvi-adapter