Originally posted by Kerrowdown +1 on this, IMHO calibration is a must when it comes to printing, or even better as part of a colour managed process.
+2 then, here. A calibration tool is must-have no matter what monitor you are using, even if it's just your laptop screen. I would recommend purchasing the tool first and calibrate your current screen.
Not all screens operate at the magical gamma curve of 2.2. My Huion display tablet was at a whopping 3.3 or something crazy like that and I finally got it down to 2.4.There is a slight, but noticeable, difference in the highlights and shadows when compared to my iMac display that hits the calibration curve perfectly.
Calibration tool first, 2nd monitor second.