Ugg-tastic?

Well, the time has come...my faithful Uggs most certainly need replacing. For many things, I am perfectly content buying imitation, cheaper models, but not with my Uggs. I got my first pair 4 (maybe even, 5!) years ago when my sister and I were participating in some Black Friday shopping, and she generously treated me to them as an early Hanukkah gift. At the time, I wasn't sure I really even wanted Uggs, but after one day in my Uggs, I was absolutely in love; they were comfortable enough to sleep in, and I loyally wore them every cold-weather day. Unfortunately, the sheepskin in my Uggs has taken a beating from the constant wear, and like I said earlier, it is now time for a new pair. While I love my traditional Uggs, I am also drawn to the fun, buttoned version:
At $180/pair, I want to make sure I make the right decision. So what do you all think? Buttons/no buttons? Anybody else have some Uggs, or other shoes for that matter, that are a must???