One of the three is on the boat and will stay there (there may even be two on the boat!). At home I have one with interchangeable 'crimp bits' for insulated crimps, uninsulated crimps, ferrules and a couple of other things. I also have an 'expensive' CK branded one.
The interchangeable bit one is OK and I get a good crimp most of the time but the 'bit' occasionally drops out which is annoying when (as one often is) working in inaccessible places. The expensive CK one is awful, it needs superhuman wrist strength and then very often produces a bad crimp.
So, how does one decide what's a good crimp tool to buy. Price doesn't seem to be a good guide (e.g. CK) so what to go for?