TOrnado's are highly technical. You may get fustrated with it trying to get it in the water. I know it takes me a long time to get my I20 in the water from the trailer and a Tornado would only be more work due to the wide beam.

If you want a spin boat, then you two are pretty good weight-wise for the F18. The sheet/halyard loads are light enough for a small-framed female crew (or you could let her drive and you pull all the strings) but be warned, the F18 is also technical. Its not just a "stick the mast up and go" boat like the aforementioned Hobies which are significantly simpler.