HSA (Health Savings Account)

[silentbob]

My firm has offered HSA+HDHP for the upcoming year. I did not go to the doctor once this year and my health has always been pretty good so presumably such a plan may be appropriate for me. If I do switch to the HSA+HDHP, is it EV+ for me to contribute the $2,900 max to the HSA even if (2,900+reduced HDHP premium) would be about $1,500 more annually than what I would spend next year on my existing higher premium?

My rationale is that because I'm in the 33% tax bracket, any pre-tax income deduction I can get by contributing to the HSA is free money, even if I don't use the funds anytime soon (because at worst, I can invest it at a money market rate). It would also eliminate any need for me to set aside money for flex-spending in future years. Is this reasoning sound or have I failed to consider other factors?