formaula supplementing

Erin
Ladies -
 Lets be serious....pumping is not that enjoyable. At least it isn't for me. I pump every morning and I feel degraded and like an animal. It's just a personal thing. I am looking to supplement with formula here and there for date nights, a wedding, etc. 
What formaula do you use? What do you recommend? Do you know anything about Parents Choice brand? (And any other tips and what to look for are welcome!)