I do occasionally use a set of Deteknix wireless headphones but have never used them on my Compadre,so cannot give a true verdict on what they are like,the main reason i use them 'occasionally' is not the fact that they are no good its the total running time of between 6-8 hours,during the summer and infact the winter i can be out for 12+ hours so a possible short fall on battery power,they suggest you could top them up during say a coffee break in your car etc,but more than often i dont go back as all i am interested in is getting maximum detecting time in.So that is the biggest problem the battery life.
Although i do have Compadre which does have the coil conversion which allows me a little extra flexibility by using other coils rather than being hardwired,but i just dont use it as a detector,if i am honest it just does not suit my detecting scenarios which is usually deep ploughed or pasture sites,but what i do do with the Compadre is use the 4'' coil on it and use it as a pinpointer probe when deep relic/hoard hunting and in situations like that it earns its keep,as it offers better depth than any normal pinpointer but also offers full discrimination.
If i was to suggest a setup like you are asking for advice for then my suggestion would be the Garrett one they work exactly the same freq and set up but the winning trump card is that all important battery life between 20-30 hours,that is for me the decision maker.