3D TV as PC Monitor problems/questions

Current pc setup:
AMD Phenom II 6x 1090t
AMD 6950 Gigabyte 1GB
16GB Ripjaw RAM
ASRock 990FX Extreme3
LG 42" 1080p 120hz 3DTV (Model: 42LW5300)


I just got it, prior to having this tv monitor I had a 37" Toshiba 1080p 60hz HDTV. The Toshiba had a "game" setting on it that when I turned it on everything became a very crisp picture. Currently on this LG I'm having picture quality problems, its connected through a HDMI cable, I cant get the same clarity I had on my Toshiba, i cant tell if its the LED lighting or what but it feels off quality wise. My other issue is there is a minor delay in mouse movement and slighty on typing. Its very, very small but i've been gaming forever so I can obviously feel it. My AMD Control center has the TV at 1080p 60hz, i scaled it because (even on my Toshiba) it never fits the monitor correctly. Every things set the same as my old setup but these issues are here and i just invested $600 non-refundable into this TV combo and its killing me. Any advice or troubleshooting would be greatly appreciated.