You asked this question at the right time because so many boots are on sale! (Hopefully they still have your size.) :)
Chooka boots get good reviews and this pair (disguised as riding boots) is marked down to $60 (from $160).
These Chinese Laundry rain boots are cute (camo!) and are $59.99. If you prefer basic black, get an extra 15% off this $59 pair with code SPRING. I kind of like these Chinese Laundry moto-style rain boots too ($45).
On the off chance you have really small feet (size 5), this Sperry pair is $58 (from $78).