If the standard SIDI Adventurer Boots are too rich for you, well here's a little more sauce for the fire. $625 will get you a GORE-TEX version of the Adventurer boot. The Sidi Adventure Gore-Tex Boots : Features top grain leather, soft rubber sole, removable arch support, cam lock buckle and goes up to size 48 for big guys.
Part of the reason for the big price is a larger than normal import duty fee on waterproof boots.
I think... let me check, yes, I believe these are the most expensive motorcycle boots we sell.