My advice would be to find yourself another boat owner who is without a crew and spend your first years learning to sail catamarans like that.

Most inexpensive, you'll learn faster, more enjoyable and I have my doubts about any catamaran out there with your 128 lbs body weight. That with exception of the Hobie wave and maybe mystere 4.3.

My (racing) crew is also of that weight and in this way I speak from experience. She is downright fanatical but even my boat of 240 lbs all up weight is alot for her.

I would do some boat hopping first before buying yourself one. That way you could find out what works for you.

Wouter