Caffe Boa in Ahwatukee is one of the best Italian restaurants in Phoenix and it is surprisingly inexpensive.  All of their pasta dishes are excellent and so are the appetizers.  They also have an great wine list including a very affordable house wine.  Their specialty cocktails are very good as well - my favorite is the strawberry basil martini.  It is the perfect place for a romantic date or fun night out with girlfriends.  Extremely enjoyable patio dining when it is not too hot.