85 will give head and shoulders shots, 35 is not wide enough for the band (and will you see the member at the back if the stage is above you??)
DOF is a key issue here if the light is poor - will the 85 focus fast and accurately enough for you to shoot a moving person at f/1.2?
I would like head+shoulder shots but also full body shots. Maybe not use the 35mm to get the whole band. But maybe just the singer/guitarist, etc and some of the background that's on the right & left of them? If that makes much sense..?
I'm not sure how maybe light there will be, but I could always stop down I guess but would like a bit of shallow DOF.
Kinda hard to explain coz the stage can be well light up but then it would go pitch black for a second or two during a specific song. I've never tried to photograph a concert before so I don't know what kind of lenses and other equipment I need.
2 bodies 35mm on one 85mm on the other problem solved
you are really going to want to get some nice tight crops and even the 85 on a APS-C is going to struggle for reach
depends on how much access you have.
the 135 f2 might even be a good long option, but i would say with the crop body start with 85 and 35
I've sorta thought about buying a 2nd body like a 50d or 60d but I know I'll be moving to FF in the future so there's no point in having 2 crop bodies I think. But I am open to renting something like the 5dmkiii.
I've never shot a concert before so I wouldn't know if I'd be allowed access to the pit area where the security guys are. But TBH if Im not granted access I wouldnt even take my 7d and whatever lens I would use to be squished in the raging crowd. I would be too scared something would happen to my gear or someone stealing it. I'd just use a P&S.
I notice you both didn't mention the 50mm, lol.