The Nikon D800 with it's 36MP sensor produces 75MB RAW files, so a 46MP sensor would result in files sizes of around 100 megabytes per shot, so a 1-2 second burst could fill 1 Gigabyte of your CF card! A longer series of rapid burst could theoretically fill an entire 16Gb memory card. Not to mention increased storage costs/problems.I took well over 1000 raw NEF images with my D800 before reselling it, many at very high ISO's like 12800. The largest file is 52,300 MB, and most of them are in the mid 40mb range.
I'd prefer a 24MP to 27MP cheaper FF body for now (so I could upgrade from a 7D)
I wonder why your files are running 75 MB? You must have a exceptionally noisey sensor.
However, when a raw file is uncompressed for editing, it can be three times the size of the raw. When applying NR or other complex PP edits, it seems to take forever. It is slow and painful.
I really wonder what it would be like to edit 1000+ images from a 46mp camera? Very painful is my thought.