Yeah, I have to agree with Womby.
If you have maxed out everything on the boat short of the spars then go carbon. Then when you have paid for that you can look at PBO rigging.
But first you have to have perfect sails. Start with the sails.
If you have a fully found cruising boat with all the "necessary" **** on board you certainly do not need a carbon rig and PBO rigging.