Unless you plan on racing or riding aggressivly you should buy some new shocks. There are several compainies that have gas shocks with gas bags inside that never need recharging or rebuilding but they are not rebuildable. They don't lose thier charge but you can't change the valving in them.
If you do decide to get them rebuilt, i would recommend buying the shock covers that cover them...this will help prevent the moisture and salt getting on the shafts. And i personally spray the shafts of mine with WD-40 to keep them from rusting during summer storage. I think the Fox shox are worth the money but like erick said it depends on how you do your riding.
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