Two speed primaries........... all the way. Trimming that genoa under load with the low gear is worth the extra bucks.... especially if you're single handing. Two speed halyard winches are handy...but may not be necessary on your thirty footer if you use a longer winch handle. For secondaries, you can use single speed standard winches.
Remember......... winches are built to last a very long time.... so the investment can be amortized over many years.... plus, the resale value of your boat will not be penalized.