i do not think that there are any official 120hz input IPS panels.

ATM my pick for a 1080p monitor is any of the low ms asus IPS, they have a bunch of 23.3 and 24" some with HDMI, some with speakers, and some with both. they all use LG IPS panels and are cheaper than the lg and dell, but have a better OSD IMO, other than that they seam identical.