Since you're asking, here's my bit of advice: Replace the standing rigging (shrouds, anchor pins, bridle wires) first, as Karl wrote. Next, if you buy the rigging from Hobie you should know Hobie changed the shroud and forestay lengths around 1983 to allow for mast rake further aft (this is a good thing because it reduces the boat's potential to pitchpole by putting more of the power over the stern, and allows the boat to point higher), but with the new rigging you will run into two new issues:
1. The jib is not cut for the increased mast rake and may luff. If the jib is still good, keep it and find the compromised spot to rake the mast between less pitchpole and less jib luffing. If the jib luffs without the mast raked back (the mast position before raking it back) then the jib is blown and you may need a new one anyway.
2. The increased mast rake will also require your rudders to be raked forward, otherwise the tiller will feel really heavy when the boat is under way, and get heavier as the boat goes faster. This means the rudders are out of balance with the mast and sail and is normal for the new changes. Your boat likely doesn't have adjustable rudder castings and the only way to adjust the rudder rake is to re-drill the holes in the rudders. But, like the jib, if you find the balance spot you may be able to live with the heavier-than-before tiller.
Both of these issues can be avoided if you were to make new shrouds using your current shroud lengths, but be sure to have the shrouds professionally made for safety. Also, using the current shroud lengths will probably mean less mast rake and a higher chance of pitchpoling.
Inspect the tramp, and if it looks good then tighten the lacing as much as you can to tighten the boat for good performance. Learn more about tightening the tramp here:
http://www.hobiecat.com/community/viewt ... ht=prebend
(scroll 2/3 of the way down to see a photo posted by mmiller)
Enjoy your boat!