We had wood rockers on our front porch before and they rotted over the years so this time we decided to go with something that won't rot and won't need the annual painting the wood ones required.  I looked at a few options and they got great reviews and were nicely priced.  The chairs were a little difficult to put together, my husband was able to do one of them himself but I required his assistance to turn the screws tight enough on the chair I put together.