ok I don't understand something... what the heck is a "twisted nematic" display?! and the ultrasharp is that truly a great monitor? what about a viewsonic or an nec? what's great? what's good? what's trustable? and answer all of those questions for the price? I'm really confused.
There are three fundamental technologies for making an LCD screen. TN, PVA, and IPS.
Twisted Nematic is by far the cheapest method to produce an LCD. It also produces LCDs with the fastest refresh rate which was the thing that mattered most back 10 years ago, but some reason marketing doesn't keep up with technology and the large majority of companies still think users give a damn. The downside to this display are many. Other than cost and and refresh rate you get **** viewing angles, so bad that at extreme angles the display colours will actually invert, extreme changes in gamma with vertical viewing angle, and the inability to display 6bit colour.
Patterened Vertical Alignment is the great compromise display. It is still sufficiently easy to manufacture and comes at a nice price, has far better viewing angles in that there won't be severe chroma shift laterally, and while there's a gamma shift vertically the colours on many displays won't get to the stage where they actually invert. Oh and it can display 8bit colour, just like the displays from 1995 could

This is important in that you can actually get smooth gradients with these displays.
In-Plane Switching displays are the gods of quality display world. They are thick and heavy (mine is just a bit over 2" thick). They have perfect viewing angles and colour nor gamma will change with viewing angle. They are a true 8bit display. They suffer a bit from refresh problems making them a pain to play some computer games, but all around they are quite acceptable. They are hard to manufacture and about the only screens these days which you buy where you may actually still end up with a dead pixel.
Furthermore the IPS screens are widely regarded as the top of the colour world so a lot of manufacturers cram more features into them, such as internal 12bit lookup table to be used with colourimeter. That way rather than reducing the output and quality of the image at the graphics card in the name of calibrating a monitor you can actually write a correction table to the screen's own processors.
What can you trust? Only the source and type of panel. The monitor world is one where very few manufacturers actually make panels. Many implement them, and many more simply re-badge. For example the Lacie monitors are made by NEC, a large portion of NEC monitors use LG/Philips panels. Beyond that each company produce both chalk and cheese. NEC will provide a bottom of the line mass produced 17" TN screen, but for a price can also provide the ASTOUNDING NEC PA241W SpectraView which has a 14bit lookup table amongst other features.
This site here:
Monitor Panel Search Database can help you search what type of panel is in what monitor.