At 27", I'd much rather get a 2560x1440 IPS monitor.
Jack didn't explain the differences between IPS, TN, VA, etc, so I will.
IPS means In Plane Switching. I won't get into the technicalities of it, but will tell you some of its advantages:
IPS panels that have 8-bit color can view 16.7 million colors while 10-bit IPS panels like the U2410 can view 11.2 billion colors (correct me if I'm wrong). They have better image quality, wider viewing angles (about 178 degrees from each side), but lower black levels and response times than TN Panels. The high-end IPS panels may or may not be unsuitable for gaming due to their high response times and input lag.
TN means Twisted Nematic. Some advantages:
TN panels have better black levels (but not the best), faster response times, but small viewing angles.
VA means Vertical Alignment
They have the best black levels, high contrast ratio, but the highest input lag and response times out of all TN and IPS panels.
If you want more information, check out http://www.pchardwarehelp.com/guides/lcd-panel-types.php