I sailed the Topaz 16CX (top of the range with better sails and a spi) solo once. It's a fun boat, but it needs a lot of wind to move. In the 7-8knts I experienced at the time it was a dog... In retrospect I should have rigged the jib in addition of the main.

Compared to a F16, the CX is more robust (rotomolded hulls), has less sail area, is 40kgs heavier and has no boom nor daggerboards.

However it cost only(!) £6000, for reference a double handed Stealth is £9200 (could be more if you want a self tacker or carbon foils), a Hobie 16 with a spi is £9700.