The only problem as far as I could gather from various reviews of 2408wfp is the so called input lag when gaming. The latest revision A02 has an average lag of around 2 frames(33ms). Input lag is very subjective as many claim that it won't be even visible to casual gamers as in your case. Maybe you can wait for opinions from people who have this panel and other panel experts.

As far as the image quality goes, 2408 is considered one among the best. Since it is a wide gamut panel, a possible problem might be finding the right calibration values especially if you are a professional. If the calibration is not correct, some colors might appear over saturated. The newer U2410 has an sRGB mode which will give you more realistic colors because most of the programs output color in this mode. The modes are factory calibrated. These are the finer points that I want to know more from professional reviews before going for this panel. I also read that windows 7 will have color management in-built so that this issue will be completely disappear. So, my vote goes for U2410 but I would wait for more reviews.

Maybe others can give you more insights...