Your current rig will handle all games fine I don't think it'd be worth it unless you just want the very best on the market.
I don't see how your games will run any smoother on the new rig if they are already struggling on your current spec since you are using the same graphics cards.
If all you do is gaming you will be much better off saving up for DX10 card.
I don't see how your games will run any smoother on the new rig if they are already struggling on your current spec since you are using the same graphics cards.
If all you do is gaming you will be much better off saving up for DX10 card.