ISO as clean as the 5D3 & 1D4
5D Mark lll not possible, but comparable to the 1D Mark lV is more realistic. The 1D Mark lV is only about 1 step better in ISO performance than the 7D, so I don't see why Canon couldn't improve the ISO performance by 1 stop on the 7D Mark ll with current sensor and processing improvements.
The noise was my major gripe with 7D.
5dMk3 (x2), 5dMk2, 7d, 550d, 16-35 f2.8L 24-70 f2.8L, 24-105 f4L, 70-200 f2.8L, 28-300m L, 50 f1.2L, 24 TSE L, 90 TSE, 8-15 Fisheye F4L, 100 f2.8L Macro, Fuji x100 + stupid amounts of video & studio gear. Addicted to buying toys.