You'll get a lot more from an IPS-panel TFT. Better colour accuracy, true 24-bit colour (TN-panel TFTs are actually 6 bits per colour and use dithering/FRC to 'simulate' the other two colour bits), hugely reduced colour shift and much deeper blacks. A 2ms response time on the other hand won't make a bit of difference. 5ms response is 1/200th of a second. Fast enough :-) Much more to be gained from superior image quality. Personally, I wouldn't touch a TN-panel TFT any more.