No the dvi cable that comes with it (which is the same as the cable on the 20" widescreen model) works just fine. At least on my panel and the people I know over on the OcUK forums. The picture is superb. You should be fine. I didn't like the standard vga inputs though. Blurry compared to DVI, and the thing kept on autoadjusting and sometimes the fonts didn't come out right. But DVI was excellent.
I still think they didn't bother playing any games at all on this panel. I thought originally it might have been a dud they had, but this is the 2nd review of this panel in 4/5 months. Even the most scathing review has mentioned ghosting is visible to the hardcore gamer (although not to me or anyone I know) but over 90% are very positive about this panel with gaming and video for that matter. So I don't think the statement "It's too slow, displaying annoying smearing..." holds much water.
Incidentally if you have an Xbox 360 premium you will love this panel with the component inputs. Although HD 720p and 1080i are not officially supported by this panel it seems to work just fine, and gives a superb picture. Even the official Xbox 360 mag commented on how well the screen looks at 1080i with the 2405fpw. Of course there is still debate over whether the panel actually outputs a 720p or 1080i signal or is upscaling 480p. Regardless the results are pretty good providing you sit a few feet back, as the aliasiing on the first batch of games is more noticeable on a screen this sharp.