I have the LG226WT and it is incredible for gaming...as someone else mentioned, avoid the WTQ as it has some artifacting issues...the WTQ is a newer revision of the WT. The WTX is the commercial sales release of the WT, so they are essentially the same.
You can tell which model it is by the UPC code sticker on the outside of the box. It will say L226WT, L226WTQ or L226WTX.
I also recently learned that LG uses the Chimei panel in the 226WT, so that is a more cost effective alternative to what many are claiming is essentially the same LCD.