About the response time, 8ms does seem a tad high but we have to be careful here. Most manufacturers will advertise their monitors as having a 2ms or 5ms response time. However, when you look at the charts, most of the time this response time is the maximum the monitor can reach during a dark scene or a low action gaming sequence. This is often not representative of an average use and the so-called 5ms monitor will most likely be around 6ms-7ms in everyday situations. Same thing applies for contrast since every manufacturer uses their own chart for measuring it. The best way to know how your monitor will perform in real life is to look at comparative charts made by neutral parties, like Tom's, who uses the same methods to compare response time, contrast and color fidelity with all monitors.
As for this particular Dell 3008WFP Ultrasharp 30", I have really no idea if it's suitable for movies and gaming or not. However, is Chris says it is, it's usually enough for me! Unfortunately, I just bought a Samsung T220 and it pleases me enough. Anyway, I do not have 2 grand to put on a monitor... yet.