Which b guitar should i get?

At the moment i have a Jim Deacon which cost under �180 with an amp included. I have only been playing for just under 2 years and i am doing Grade 5 Rock School soon. I am looking for a b will allow me to play fast, funky/jazzy riffs, as well as being able to play rock. I like playing Green Day, Red Hot Chili Peppers, and some Stevie Wonder songs like Sir Duke!