LCD panels come in several flavours including TN, PVA, MVA, and IPS. IPS panels are generally preferred due to the extremely wide viewing angles they typically allow for. However, these panels are reasonably uncommon. So here is a short list of recent monitors with IPS panels:
20'': Dell
2007WFP (1680x1050, not guaranteed S-IPS—could be S-PVA)
24'': LG
L245WP-BN (1920x1200)
30'': Dell
3007WFP (2560x1600)