Wow! You are really suffering! I take zyrtec, flonase, singulair, sudaphed/guaifenesin and patanol eyedrops. I was like you with recurrent sinus infections and bronchitits. My sinus CT's also didn't look "too bad" but I hate to say it, but I never got complete relief until after I had sinus surgery.

One thing you should ask about is getting some prednisone. My allergist would prescribe a short taper with the Leviquin or Augmentin and it helped clear the infection much faster than the antibiotic alone. You'll get horrible PND for a while, but that means the sinus tissues are less swollen and stuff is finally able to drain.

You also sound like a candidate for allergy shots, if you can get them.