The right pair of boots, are the ones you find most comfortable on your feet, possibly Meindl or Bhutan are not the boots to go for, you can only find that out by trying them on.
Boots are a personal choice, and the only sure way of finding the best boot for your feet,is to visit an established retailer and try them on.
As for category boots, ie designed for different uses, that's a load of rubbish, it's just a very clever ploy by the manufacturers to increase the price on a particular type of boot.
I used to wear Brasher Hillmasters for every type of terrain, however severe, simply because of the all round comfort and support they offered, and they could put up with an awful amount of punishment.
You see, boots are a personal preference, the most important aspect, is comfort on your feet, and you can only discover that by trying them all on.