Best possible configuration..?

[Fallen29]

I am pretty happy with my computer but.. I am very new to PC Gaming. I was wondering which configuration would give me the best possible experience while playing Fallout New Vegas.
Here's a little pic with some of the options the game presents me with.

http://i64.tinypic.com/331omrm.png

 

[Gamer2886]

Mate you have to go ultra low @640x480.

Kappa.

Hahaha jokes aside, obviously ultra dude, maybe even @4k.