Anandtech has an excellent piece on SSD's, which really helps you understand how they work, which ones are good and which ones aren't.
http://www.anandtech.com/show/2738
Even though the piece is from 2009, it still is very relevant.if you don't want to read it, the OCZ Vertex 2 and 3 are just fine, as is the Samsung 830 and The Intel 520.