You say "big time" contributors-where do you draw the line on the $ amount? Maybe the not so big time contributor put more time and effort in their donation-shouldn't they get something too? If they are tired of flowers-just an idea give them a gift certificate to go out to eat somewhere-I'd say everyone enjoys a night out, and you don't have to spend a lot of your time deciding what to make or how much you will be spending-I'm sure of your money.