PC Adviser have given reviews on the Prolite E431, and said it was very good. I have just bought the Prolite E435, it is a bit more expensive but has the following advantages over the E431.
(a) 2.4W speakers against 1.5W
(b) Tilting screen
(c) Lighter in weight
(d) 10 msec response compared to 16 msec
I bought it from Komplett.co.uk for £265.
I suggest you buy the one with Silver surround.