zuki, I use the Countryman IsoMax MHHP6HH05L. This was the model recommended to me by Full Compass for the application of hardwiring to the Pa2X which has phantom power and having two speakers behind me. It is substantially cheaper than the e6i, a little more visible, but much more discrete than the Crown that I had previously owned.
It required minimal setup and I have experienced no feedback, and love the tone, suits my voice anyway. Well worth a try.
Best wishes, Graham
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Graham, Korg Pa1000, Korg G1 Air, Countryman E6, Roland BA330, 2 x Roland CM-30, , Mackie SRM150