How much do you value your life and the life of others on the road?
If it involves safety it's no question, you spend the money.
If you're only keeping the car for another four years buy those cheap "quick strut" assemblies and they should last to that point. I've seen them for 135$ for the whole assembly. You can check prices out at
www.Rockauto.com. They have decent prices on that site.
If you have never done your suspension you will also be needing a new sway bar and end links because the sway bar won't be able to handle the new corner speeds you can reach with the new stuts/springs/mounts.