If I read your post correctly, It sounds like you are going to be wearing these boots all day long at work. If that is the case, the Sidi Vertebra 2 boots or any high boot with hard calf protection really just won't cut it.
If that is the case, then I would recommend, the Sidi Champion Air Boots. as shown here:
Sidi's can be found here:
Clicky Clicky
My local BMW Motorcycle dealer stocks Sidi's and I was looking at these over the weekend. They are great boots. Definately better than a pair of Timberlands and as comfortible as Nike's.
I also own a pair of Sidi Vertebra 2 boots, and they are definately the best boots I have ever owned. Also as comfy as Nike's but with all that hard protection around the leg, you really wouldn't want to walkaround with them all day. Also they squeek.
Thanks,
Ray