In your opinion, what is the best/least expensive wireless in-ear monitor for bass? I don't mind spending money to get quality, but I don't want to spend $1,000 if $600 will be good enough and I don't want to spend $600 if $200 will get me something quality. I also don't want to spend $200 if I will have to turn around and spend $400 later on. More details: My band plays out about every 2-3 weekends. I am typically standing within 20' of the mixer but sometimes up to 50'