I'm doing the same and am strongly brainstorming:
*Seventh Circle 8-channel
DIY Mic Preamp Kits - Seventh Circle Audio
I still can't be perfectly sure how many of which type. I'd probably be well off with 2 x N72s and 6 A12s, into a Fireface 800 or similar.
With my budget I'm thinking more about direct close micing common sound sources more than worrying if I need a J99 to capture the essence of a special room which houses a flautist
Other than money, the only hitch is whether to have them build the N72s, because using an ocillioscope is recommended (but they claim not required) for that one. But it's a lot more expensive having others build them, and frankly I like my own soldering skills etc.
Good luck to you AND me!
-will be back to finish this train of thought-