I've got 2x24" displays at 1920x1200 - and yes that's what I want, accuracy.
It doesn't have to be 1:1, it can be 1:2, 1:50, 1:5.123125102984....
I'm certainly not planning on "doing lots of movements to get to the other side of the screen", I've got a decent mouse and a decent hand - I want to be in control of the cursor, the dragging through mud/zipping to the corner of the screen situation seems completely unusable to me, just as turning it off seems to you - although you go on to say:....
Yes, the mouse acceleration on osx is utterly rubbish, it doesn't have anywhere near as good a 'feel' to any other desktop OS. Don't you think it's a bit silly to have to resort to 3rd party, paid for hacks to get something more usable? Even more so when, for me, it still doesn't work satisfactorily.
I don't have a magic mouse and haven't tried MagicDriver - maybe it'll help the OP.