IPS or 120 hz

[Crazymilk]

Hi all.
I am really struggling to decide on a new monitor and hoping you good folks can guide in the right direction.
Currently have a Dell 2407WFP and it has been ace. I am purely after the best option for fps gaming.
I was just about to go for the Dell 2410 IPS but then started looking at the 120hz monitors.
I have been looking at the new Samsung 750 LED 120hz.
So they are my two options???
The Dell 2410
http://www.overclockers.co.uk/showpr...id=510&subcat=

Or


http://www.overclockers.co.uk/showpr...d=1425&subcat=
My main issue of the Samsung is that I will be going from a 24'' 1920x1200 to a 23'' 1920x1080.

So simple question.... Which one for the best gaming performance/experience???

Will the 120hz Samsung give any advantage on online FPS gaming against standard 60hz?
Smoother? Better hit reg? More precise?