In-Ears are great if you have control. For me, I feel disconnected from the audience if I am only monitoring through IEMs. At church, I split my mic and keyboard signal... one set to the FOH and the other set to powered monitors. Currently we are using the Yamaha MSR-250 powered speaker on the floor. I run my sequences, keyboard sound and my voice. As long as I can hear me, I am good to lead worship.

My last gig was up against a wall... harder to hear myself but it worked. I had 2 Yamaha DXR10 speakers on poles in stereo. 85 seniors staring me down. My voice wasn't good because of a cold. I told stories about my life... had them sing along with a few of the tunes... no one complained that I was too loud. I connected from the beginning and they loved the performance. Lots of laughs! If I would be in IEMs... the result may be different.