I've sailed most of the boats you've mentioned, and I like the Tiger, but if you're a novice to cats, you may find it overwhelming because the ride downwind (actually on a broad reach) is flying on an edge.

I'd stay away from the Miracles because they're strictly a racing boat and not beach-friendly.

I like the Hobie 18; you won't get intimidated by the racers because most of the best have moved up to the Tiger class.

Wyatt