This might sound stupid but... I had a pair of headphones I gought at Radio Shack. they had awesome isolation and pretty good sound (not for mixing by any means) but they worked really well for me for about $21.00 until my sons friends stepped on them and broke them. I liked them for wearing for recording but I don't use them for mixing.
Buy Sennheiser RS 110 Wireless Headphones online at Musician's Friend is what I use for mixing and editing. you might want to look into these for you and the rest of the band
Buy AKG Sennheiser/PreSonus Studio Headphone Pack online at Musician's Friend sennheiser makes great cans man!