I LOVE my zippkits outrigger, the JAE33FE. They are the fastest boat you can get. riggers are just minimalist hydroplanes. you have to build them yourself though but it isnt all that difficult. it took me about 4-5 days (mostly waiting for glue to dry). They rip pretty hard. like hitting over 100mph if you do a youtube search. with a flycolor 150A esc and a like a rocket RC motor they are right around $350 to build.
I'm sure you want a ready to run though. the only one is the proboat UL-19 which they discontinued because horizon hobbies sucks. that boat was badass and beautiful and popular. IDK why in the hell they would discontinue it.
the other option is the build a fiberglass hull. go to offshore electric and look for delta force hulls.