Yes, it is totally worth it.
If you can get the eVGA, get it. Excellent company, make some of the best cards out there. If that isnt in the cards (no pun intended) then go with the Gigabyte. But I'm not going to shoot down Leadtek, they are excellent. They have the best stock coolers available. Dont go with MSI, my personal experience with them has been terrible. And as everyone knows, ASUS dosent make anything bad. So if I were to put the cards in order from best to worst, I would go: eVGA, ASUS, Leadtek, MSI.