Hi

We have a rocker and DS loves it. It has a hood and a toy bar. Its not a vibrating one nor is it musical. Its great as its portable. I take DS out in the yard everyday and it keeps him amused while I hang the washing out etc.
We got this for FREE from Babyco as we'd spent a certain amount of money there and it was a special offer they had going. Not sure what the deals are now though. Otherwise it would have cost $100

We also have a Fisher Price Aquarium Swing. My sister bought this for us for my baby shower. I'm pretty sure it was $300 down to $150 at Toys R Us. DS loves this also. You can turn the seat so it swings either side to side or front to back. It has a few different sound choices including music.

DS is almost 7 months old and still uses these things everyday.

All the best with your choice.