If you want the fruit flavor to take the forefront, then I would definitely keep the IBU's under 25. One ounce of Citra will give you 28.9 IBU's. That is reasonable for a fruity ale, but I would not go any higher than that, unless you are looking to make something like an IPA with a HINT of watermelon. Certainly, I would not do any late hops additions without reducing the bittering hops first.
"Give a man a beer, and he will waste an hour. Teach a man to brew, and he will waste a lifetime!" Bill Owen