There was a really good article in Tape Op #90 (pages 22-32) titled "Less is More", about classical recording. It was about Bob Fine (written by his son Thomas) and seemed to focus on placement. The scope was about the transition from mono to three omnis mixed to stereo. The mics used were U47's, KM56's, Altec 639, and Schoeps M201's. Due to current value and availability, these are not realistic suggestions, but consider getting 1 extremely nice mic and pre and meticulously work on placement. Possibly 2 and do M/S or blumlein. Anyway, I think to some degree less is more.
If the parts are rehearsed, and the orchestra is balanced, this can yield excellent, timeless results.
Good luck! Post decisions and recordings too!