Need help choosing pump for occasional use!!?

I am a stay at home mom so I will be nursing pretty much all of the time.. but there will be times that I will want to go out and leave the baby with grandparents or with my husband, or occasional feedings where my husband wants to bond with the baby, so I would need milk for those times.. What is the best pump to get for this? I know medela pumps are the best, is there a good electric pump that you recommend for occasional use? Like I said I won't use it all the time, maybe pump once a day or once every two days and freeze the milk if I know I am going somewheres etc... Thanks for your help :)