Not so much the panel technology that I consider when I purchase my monitor, but rather colour accuracy and the resolution.
In terms of colour accuracy, most of us can get by with the sRGB colour gamut, unless you are working with specialised needs in mind and you'll need the expanded AdobeRGB gamut. TVs are generally not recommended for serious editing work because of it affords little to no colour adjustment and/or accuracy (e.g. there is no individual R, G and B controls where needed, limited contrast, brightness and/or temperature setting, etc), and the resolution is not that great.
But, as a disclaimer, I've not tried calibrating TVs with a colour calibrating tool like Spyder4, so I may be wrong when it comes to adjust colour accuracy - it could be done after all. You'll need to do your own research on this.
Then you have brightness uniformity, connectivity options, and all the other associated parameters. I really recommend doing a thorough Internet research before making your decision.
IPS panel or not, it more often translate to viewing angles and pixel response time, which is not really critical in photo editing work where you start straight on to the monitor most, if not all, of the time.
I chose the Dell U2412M over the 23" model because of the aspect ratio (16:10 vs 16:9) - the extra pixels top and bottom help offset the space taken up by the menu bar and in Lightroom, so I have more working space. Having an IPS screen is a bonus, but I didn't fret much over it.
