Fuji Neopan 1600 only comes in 35mm, not in 120 rollfilm. Going on what nihraquk says, your best bet is probably downrating Ilford Delta 3200 to 1600. Otherwise you will have to uprate Neopan 400 or some other 400 speed film as there is no 1600 speed B & W film in 120 size on the market. Regret I know nothing of the 800 speed colour films you're considering.