CEN boats are really simple. i would go with one of these

traxxas blast - towerhobbies

turbo vee 2 - towerhobbies

aquacraft ep hammer-towerhobbies

bass fisherman boat- towerhobbies

cen grey thunder, aqua jet, or wave shark- offshoreelectrics

the first boats i listed all go about the same speed. the cen boats go a bit faster but cost more too

there are more boats like the first ones i listed but that was all i could think of