Check if your colorimeter is compatible with BlueEye (in case of Lacie) or Natural Color Expert (in case of Samsung). If you are already using a DDC-CI capable calibration package like Eye One Match or Coloreyes check with your software provider if they will work with the monitor in question via DDC-CI (Xrite calls it "push button calibration"). Be warned that most manufacturers have no clue about it.
In any case do what you can to ensure that you can calibrate your monitor using monitor LUTs and not the videocard LUTs - that's the main reason you pay so much for those monitors.
Here's a link that gives you an idea what colorimeters Samsung software works with:http://www.samsung.com/us/consumer/learnin...p_download.html
Note that none of the Spyders and even older Xrites are on the list but Huey is - not a good sign. And as you might know software that comes with all Spyders is not DDC-CI compatible so SOL for Datacolor customers (unless Coloreyes or Basiccolor work with those monitors, which would add several hundred dollars to the cost of the purchase).
Samsung goes even further and provides videocards compatibility list which is extremely thoughtful.http://www.samsung.com/us/consumer/learnin...patibility.html
I haven't seen any BluEye compatibility charts (definitely works with regular EyeOne, not sure about LT, probably works with old Monacos and not sure about Spyders). Also, Lacie software is not available for trial download.
Nether Natural Color Expert nor BlueEye are particulary great pieces of software but at least you would know that you have something to fall back on in case other calibration software can't access internal monitor LUTs.