Datacolor User to User Support Group.

I have read the spec comparisons, but am wondering in the real world
will I see a noticeable improvement in my monitor calibration and
monitor profile? Also will I see an improvement in the screen match
with my prints (made on an Epson 3800 using profiles created by
PrintFixPro Spectrocolorimeter using the v 3.5 software)? 

My monitor is a NEC 1990SXi (one of their better displays) and I run
Windows Vista. Thanks for any thoughts that you might have on
this, Ken