Basics - New Tshirts

In looking into my closet for basics to see I have and what I need to make my closet better and easier to work with, (See more here.)  I see that I have a need for a GOOD basic tshirt.

I currently own and like the Mossimo Vneck Tshirts. I am in the market for a good basic tshirt.. preferably vneck.

Any suggestions? What are your favorites?