The U2410 doesn't have an s-video input. To get my Atari 800XL to it, I bought a cheap ($14) S-Video to HDMI convertor. It will do either 720P or 1080P. Image looks the best in 720P. The color vibrancy is a tad low. I don't know if that something that would be fixed with a better convertor or not.
A8 screen (ignore the moire pattern, its not on the screen). It's pretty crisp:
The convertor. I got this one as its the one they are using in the new XEP-80 II:
Might have to get one of the OSSC's for the 8bit and the Dell SE2722H.