For a comfy fit and big stylish leather boots, I recommend Newrock boots.
Very comfy and they look great. I have a pair, big flat platform heels, thick, heavy leather, zip up boots that do up at the side, steel plates on the back of the heel and front of the toe (not internal steel toecaps, the steel plates are on the outside on the ones i have), leather straps, lots of darkened metal and black leather.
I need to get the inside of the lining of one of the pair repaired though.
Cost a bit over 200 quid, more than I'd usually ever dream of paying for clothing, but I love those boots. So comfy, so big and heavy and have a good feel to them in a sensory, spazzy way, and of course, it'd be a daft street punk who'd risk getting kicked with boots like that, they weigh somewhat in the range of a house brick (per boot), and would do an awful lot of damage with a well-aimed stomp, and something like a roundhouse kick to the ribs or side of the head would flatten a horse. Big, clunky, gothy....just my style.