need advise about cockpit and XC 100


I am about to buy a power censor Rally XC100.
Then I need to display the measurement.
I do have a gamin forerunner 945 but I may invest into a cockpit.
I don't even know if the 945 can be coupled with XC 100 to display power
What is the simplest cockpit able to display both my heart freq from forerunner 945 and power from XC 100 ?
I don't need GPS map and all these fancy things.
Thx !