I'm out of date in the LCD market (which changes almost hourly!), but there's a nice technical thread about the underpinnings in this
hardforum thread.
Essentially, you do NOT want TN technology. IPS or S-IPS technology are theoretically best, but the PVA and S-PVA are likely as good in real life. (Samsung's T-series of displays use PVA or S-PVA, for example, and are quite good.)
You can get a fairly current listing of what technology is used for a given display using the
tftcentral panelsearch--or just enter IPS and see which models use that IPS or S-IPS technology in their panels.