It would be interesting to know how many boats at NA's last year purchased 2 or more sails in 2008 - Steve I think you are close to the top in the "arms race".
Fuzzy Wuzzy had a new spinnaker - that was it.
For us 4 -5 sails/year is too much money - but I'm not suggesting to change the rules it should be up to each skipper to decide how much to spend on sails.