It just might be the 1D4 .... I met a Canon rep for Michigan, Ohio, Illinois, and Indiana a week ago yesterday in Livonia, Michigan at a Canon Demo Day.
He asked me what I shot, and when I replied a 1D4 and 5D3, he said the "1D4 is a beast".
I asked him what he meant and he replied it was the most underestimated (and underpriced) body in the present new and used lineup.
I felt pretty good about that ... since he had a 5D3 personally, and used a 5DS and a 1D X frequently he had a good handle on several recent bodies.
He praised "the Beast" for it's handling, speed, versatility, exposure accuracy and colour fidelity ... guess what is my 1D4's new nickname?
5D3,1D4,S90,6S&Moment Lenses,Hero4Silver,GPS-E2,2x580EX,430EX,90EX,EF16-35L f/4 IS,Samy SYTS24-C 24TS,EF24-105L IS,EF50 f/1.4,EF70-200 f/4L IS,EF300 f/4L IS,EF100-400L I IS,Kenko DGX 1.4X,Canon 2X TC Mk II, RRS&Pro-Media L-Brackets,Manfrotto MHXPRO-3WG & Roller 50,Sirui 306&K-20,Giottos MT-7371&MH-3300,Velbon ElCarmagne 530,CamRanger,Phottix&Canon Remotes,Lowepro Backpack,ThinkTank Retro 20&Modular System,OpTech straps,Lexar/San Disk Cards