i love range finders and much prefer them. They can be problematic if you work professionally, but even then they can produce the most amazing images. (Depending on your particular area of pro work.) But, they are simple, straight forward and a joy to use. One word of warning.... If you opt for and can afford an M8, then be aware that it has been a flawed product. (In my opinion.) Maybe now they have sorted out their problems, which I will not go into here, but you can look up the heated debates on this excellent website for that. But just be aware that there is the RD1 and the M8 and pixel 'size' like many other things are not the be all and end all!
So before you embark on this fabulous journey, make sure that if you do opt for the M8, be cautious and make sure you know what you may be letting yourself in for.
Ray.