I play in a 5 piece rock band and 3 of us sing. I sing lead most of the time with a wireless Sennheiser. However, the other guys have wired shure Beta 58s. I can't remember the exact model (am I am at the university right now so I can't go look as this stuff is all at home), but it is a hyper cardioid as well. I typically have two monitors on each side in front of me and the others have one on their side closest to the main. When the others sing lead but don't play, they move to the middle to have wireless freedom. When they sing and play they stay in their respective spots. Basically what I am after is to get a live backing vocal sound kinda like the American Idiot era Green Day. Billie is always front and center. Would a good technique to try be having the guys back off the mics when singing backing in order to reduce proximity effect? I notice that Mike always is about 6 inches away. Does that help to avoid voices sound like they are eating eachother? We also only have vocals in the wedges too btw just incase you thought of adding that in a response. Thanks.