Hi, you make no mention of the nature of the "work" for which this monitor will be used, nor do you list any minimum specifications, both of which make it difficult to recommend any specific monitor (except using some assumptions - which would, more than likely, be wrong...
What can be safely assumed is, being used for work, the amount of time spent gazing at the images displayed on the monitor would be a fair proportion of the working day. If correct, then one aspect that should be important lies in the quality of the images displayed and the "ease of prolonged viewing" to reduce unnecessary strain on the eyes.
IPS (which, by the way, is an acronym for "In-Plane Switching" - a technology that delivers better colour accuracy and wider viewing angles without colour shift) as mentioned in another post is, currently, the best compromise between display quality and purchase price for extended usage.
There are basically two levels of "quality" within the IPS range:
1) A-IPS: Advanced In-Plane Switching is the "consumer-level"
2) AH-IPS: Advanced High-Performance In-Plane Switching is the "professional-level"
Lacking details of the nature of the work (and other) usages, you will need to either provide a list of the applications used or a list minimum display specifications required (typically display resolution, response time, colour gamut, etc).
LG Electronics are probably the major manufacturer making IPS panels and their range of IPS monitors is fairly extensive and reasonably priced - albeit targeted more at consumers than professionals.
The typical spec level for a consumer 27" monitor would be:
a) Resolution: 1920 x 1080 (aka FHD)
b) Response Time: 5-6ms
c) Colour Gamut: >90% SRGB and ~70% Adobe RGB
Asus, while also offering consumer models, also offer better-spec'ed models targeted at professional users (typically Photoshop users) and their 27" offering (PA279Q) has the following specs:
a) Resolution: 2560 x 1440 (WQHD)
b) Response Time: 5ms
c) Colour Gamut: 100% SRGB and ~95% Adobe RDB
d) Delta-E (colour accuracy): ~2
These monitors are also factory calibrated and shipped with a calibration certificate for the specific unit as tested. Out-of-box is great but does come at a price premium.
I started out with an LG IPS236V - a 23" 1920x1080 consumer A-IPS panel and blew the socks off my previous Samsung 23" model. (I still have it and use it on my laptop when at home as an extended desktop display).
Link:
LG UK - IPS Range
Next, I got myself what can best be described as a "prosumer" Asus monitor, their ProArt PA248Q A-IPS display - a 24" 1920 x 1200 intermediate A-IPS panel.
Link:
Asus PA248Q
Finally, I decided to go the whole hog and get the Asus ProArt PA279Q a 27" 2560 x 1440 professional AH-IPS panel.
Link:
Asus PA279Q
I flogged off the PA248Q to a colleague who nagged until I gave in... but that PA279Q is a real keeper - really great colour rendition, decent resolution and wide viewing angles when showing others the work I've completed. Its also an extremely versatile monitor which excels at Photoshop thanks to its colour depth and accuracy, performs great with movies due to resolution and colour rendition and permits extended working time due to low eye-strain.
BTW, both of these Asus ProArt PA2xxQ monitors come with a really great (and very stable) stand that also permits height adjustment and pivoting between landscape and portrait orientation in addition to the usual tilt/swivel.
While the prices may tend to make you baulk at opting for one these ProArt monitors, it is wise to remember that a monitor is one part of any PC that you use the most and - in the long run - it's worth it to skew any budget in favour of a better monitor.