Hi emig17,
I'd say that your choice of the display screen and calibration & profiling system depends on budget and, of course, your area of work?
The Eizo CG model coloredge screens are very good with good uniformity and gamut - and it is convenient to have the inbuilt calibration & profiling sensor on models that include it.
If you'd also like to calibrate & profile your laptop as well perhaps for when you're traveling, though, you'll also need an external sensor that you can move between screens - and software to use with it.
If you need to keep the cost down, I've seen pretty good results with decent quality screens and the datacolor Spyder express which is pretty low cost, although I do like to use it with the basICColor display software which i feel is a significant upgrade.
(the basICColor display software works well with the Spyder 5 and you can get a free demo for 14 days to try it out.)
The i1 Display Pro is a good instrument too, a little more costly again prefer to use it with the basICColor display software. More about that software here:
http://tinyurl.com/gn6qzak
Maybe let us know a little more about your work and then the advice can be tempered to match your needs.
I hope this helps
if so, please do mark my reply as "helpful" and if you're OK now, please mark it as "correct answer" so others who have similar issues can see the solution
thanks
neil barstow, colourmanagement.net