If your going to pick an choose I'd say salifert or Red Sea for Calcium but stick with Hanna for other 2.I like Hanna meters, but the calcium one isn't known for being super accurate. So it depends on how much you care about accuracy.
Now the phosphate and alkalinity can't be beat for accuracy and convience. I've never used the Hanna salinity probe so no thoughts on that one from me.
Regardless of what you pick, pick a test kit you will actually use consistently. A super accurate and fancy test kit doesn't do you any good if your not using it.