For some years now, I use the TCX(formerly Oxtar) Infinity Gore-tex boots, also a crossover between road and offroad boots. Very good boots, but they are not as sturdy like these Sidi boots, on the other hand very "walkable". Although the Infinity seems a bit higher then the Sidi. Anyway, my boots are still waterproof, so the Gore-tex does what it promises(and take care of your gear!). Before that, I always used a pair of Matterhorn Army boots(10" height with Gore-tex, still in good condition after 8 years!), not intended for offroad use, but does the job very well onroad, sturdy enuff!!
Greetz, Hans.
Link for Matterhorn boots:
www.afmo.com