The EX3 and Spyder are not good probes. The cheapest quality probe I know of is the xrite i1 display pro. Everything below that is basically a toy. I've never used a ColorHug though so I'm not sure how it stacks up.

As for software, DisplayCal is actually very well regarded in pro color and considered one of the only serious three choices, the others being CalMAN and the big dog being Light Illusions.