I have about 4 chain tools, most have a chain break capability, but I prefer the Motion Pro chain breaker to break the chains over all of them. It's about 25 bucks but breaks chains like butter. I use my electric impact (use low power and speed) and it zips the pin out in a few seconds:
I also have the previously mentiond DID riveting tool as one of the few I have. It's the most recent one I bought, and it is a little awkward and took me a bit to figure out how to use it (even the 2nd time I used it). One thing I DO like about it is there is no measuring if you have the plate pushed on the correct amount, or if you have the rivet flared enough. That tool sets both exactly where they should be and I do like it for that reason.