What are you planning in doing with it? If you need a delicate trigger to control the work, the cheif will likely not meet that as others have mentioned. Look up the TTC video between it and the very similar Mac. Mac makes a little less power, but the trigger worked properly rather than being an on/off switch. Even just wailing on a wheel bearing with something like the older 498 shank Astro, big nasty, is somewhat challenging as the on/off nature of the trigger makes it hard to control. The astro 498k is much more controllable with a superior trigger.
My use case is all automotive, I need a good trigger to not bounce around and damage things as well as simply throttle power application.
I have not used the IR, generally I have had good luck with IR tools. Astro 401k is also in the conversation, CP makes guns in that size as well. Torque test channel videos are probably the closest example of apples to apples data for this type of tool that I have seen.