Have a good look at Haix boots.

Haix is the european market leader in shoes for MIL, LE, EMT and FD users - and not without a good reason. The company is based in Germany and the quality of their products is extremely high. Their boots are comfortable (usually zero break-in required) but very tough, I've had my oldest pair of Haix boots in moderate-to-heavy use for 5 years already and they are still good to go. Before I used to wear out a pair of boots in 1-2 years. Someone actually wore Haix military boots (the model usually seen in AFG) for a marathon, and he claims he didn't get any blisters or black toenails.