Destination back-ups

I haven't actually made a decision yet, but the closer my payment deadlines gets, the more I feel like I should opt for a cheaper trip.  How badly do I want to see Ireland, Mount Pilatus and the French Riviera anyways???  :(

So I've found 2 other trips that I'd probably love just as much.

Costa Rican Adventure.  This includes all the fun stuff minus jumping out of planes.  Kayaking, cliff jumping, waterfalls, zip lining, and white water rafting.  

Spain, France & Italy.  It still has the French Riviera and Barcelona.  But as beautiful as Italy is, I don't think I need to spend 3 nights in Rome.  I think just typing this is helping me make my decision.  

If you can't drain your savings and go to Europe for 25 days when you're unattached and have no real responsibility before grad school.... when can you?