No I think the FX-1 is more a modern interpretation of the H17 - A solo sailor with spin capability. The FX is about 140lbs heavier than an A-cat.

Sarah - Here in the Tampabay area Jennifer (who posted above) pretty much kicks everyone's butts with her Taipan 4.9. I think important factors to look at are the ability to right the boat yourself and how well you can depower the boat when the wind picks up. If you can't depower the boat enough when it's windy you just can't go fast enough to be competative. The best thing to do is try and test sail as many different boats as you can and see which one your most comfortable on. Most cat sailors are willing to take you out on their boats to try them out.
Good Luck,