I know this is a subject that'll probably have been discussed loads of times, yet another gear discussion. However, I do need some very specific advice so forgive me for opening a new topic.
My current gear: D90 + Tokina UWA + 35mm + 50mm + 85mm. Great for when the light is not too terrible and things aren't happening extremely fast in front of you. However I've been doing some events/concerts assignments recently, and even with the superfast primes (all 1.8 / 1.4) I'm having a hard time. Also, it kinda sucks having to change lenses all the time. I invested in primes a while back because of their superior image quality, their DOF and low light capabilities. However, I'm not getting enough light in still at the moment, it turns out, and also the switching lenses is killing me.
So I'm thinking about getting a D700 (or its successor if there's any news soon). Great high ISO performance, and it's a second body. My perfect lens would be 24-70 2.8, however my finances aren't infinite and I think it's a tad bit too large. So I'm considering just sticking to the lenses I have now. I'd use the Tokina 11-16 on the D90 and fit the D700 with the 50mm or 85mm probably. The 35mm is a DX lens BTW. Of course my lenses lose some of the focal length I was used to having on the D90 before. Since the Tokina is a UWA lens, I'll still be able to use it at somewhat slower shutter speeds.
I'm curious to know your thoughts on my considerations, maybe you've faced a similar problem yourself.