Just wanted to chime in w/ my opinion on the Dell U2410f as I've now had the opportunity to put one through it's paces next to my trusty 3yr old Dell 2007WFP S-IPS.
TXT Clarity:
For starters, the 2410's txt looks a bit more blurry than the 2007 and not as sharp. There's just something not quite "right" about the 2410 when I view and and I can't put my finger on it. But when reading the 2007, it feels more like reading paper as opposed to a computer screen. TXT and overall "webbing" feels more clear. Like it's just there instead of pixels floating around.
Colors:
Next, colors even in SRGB mode just don't look as "normal" to me as the 2007WFP. I attempted to adjust in custom color mode, but I've no such device to help me w/ this and gave up after awhile of futzering w/ it. I'm by no means a calibration expert.

Also, the standard, gaming, multimedia, etc modes are worthless as they all tint the image to extreme colors, ie. gaming mode turns everything red. Also, only gaming gives you access to dynamic contrast and only custom gives you access to changing the colors. So you're stuck w/ red. I tried to change the settings in the Nvidia control panel, but once a game launched, the colors reverted back to red, ignoring my settings. I'm a simple guy and there's nothing I have to mess w/ on the 2007 for it to look "right." It just does. That goes a long way for me. During the time of owing the 2410, it just seems like it's added more complexity and frustration to my computing experience.
Brightness and light sensitivity factor:
I'm extremely sensitive to bright sources of light. I get migraines daily now.

The 2410 is the sun to me. I need to crank it down far enough so that white becomes grey and this saddens me. The 2007 on the other hand can be dim enough to avoid fatigue whilst still remaining white and keeping blue BLUE and not lame light color challenged anemic blue. The 2410 is a bright monitor and you really need it to be running fairly hot to see the colors. Also, through my glasses, at even the slightest angle, there's a reddish hologram shadow effect to txt or lines in general that give me incredible amounts of eye pain. I don't see this at all w/ my contacts, so it could just be the type of glasses I own. Either way, I can't sit in front of this monitor for more than 30 minutes at night before feeling fatigued. Keep in mind, I'm a heavy migraine sufferer. Also, that the 2007 does not cause me this issue.
Controls:
Ok, so I figured out you don't need to press them hard to function well. They still suck imo. Buttons would be better. But lacking the ability to actually customize the various presets AT ALL truly sucks. What's the point at all in having those settings if they dont' allow me to customize them?
Gaming mode:
I felt a difference in mouse smoothness. Too bad it was so bathed in red I couldn't enjoy it.
Contrast ratio and...Glare...what?
My 2007 has always killed blacks. So does the 2410. A bit less so, but its obviously still an IPS. It's not an enjoyable experience or anything I'd want to watch a movie on. This was in custom, standard, and srgb modes. Of course I may be spoiled from looking at a Zune HD the other day. Honestly, I really have no desire to own anything else until OLED grows up.
Ok, so the IPS matrices have that funny little black sparkle wo/ a polarizer right? But my 2007 doesn't have one...I don't think it does anyway. And it doesn't shine anywhere near as bad as the 2410 when watching a movie. I can't begin to tell you how incredibly distracting that is while watching a movie. It's the only thing I can focus on. I have no idea how this can be the number 1 rated multimedia monitor w/ this issue and...
Wrap up:
I'm pretty sure that just about covers it. So in the end, I prefer my 3yr old 2007WFP that got removed from the OP's list to this new fangled 2410 that's now #1. I just wanted to throw this out there w/ as much detail as I could so that others w/ similar tastes or opinions as mine would know what they're getting into. I think if the monitor had a polarizer, wasn't so bright, had a standard gamut panel, a tighter pixel pitch, custom controls worth a damn so I could keep the gaming mode, and was around the same $, it would have been perfect for me. As it is, there's just too many issues.
I would like to hear from anyone else about the glasses + slight angle = red hologram shadow txt issue if you have it or thoughts on why, ie. H-IPS vs S-IPS due to the way pixels are aligned maybe?