2004 Jaguar X-Type Shocks & Rear Lower Control Arm Bush

Hi, I took my car into the dealer for service and they told me I need new rear shocks, lower control arm bushings and an alignment. They said I can't get an alignment without first replacing my rear lower control arm bushings which are beginning to sag. I also need new rear shocks. They quoted me about $550.00 for the rear control arm bushings. Is this high? Do I really need to do this before I get an alignment? Also, my car doesn't really bounce around too much - do I really need shocks? Thanks in advance.