I used to do it that way too. The Chacos are much better IMO. They fit my narrow foot better than anything I tried from Wallyworld or Teva. In addition to narrow feet, I have high, rigid arches. Few shoes and fewer sandals support my feet well. They've lasted longer than cheap sandals too. By the time I wear out the sole, they'll be at least 3 years old. Even then, they won't be completely worn out. I just won't have the heavy tread of the "Terrano" soles.
Chris