To be honest it doesn't really fit the ships design, you have all these "thin" profiles and then suddenly a large bulky structure. The other had the benefit of still retaining the sleek shapes and has a flow to it that just seems right. Personally, I'd suggest having the impulse crystal located just fore of the Engineering neck, where the rectangle that follows it blends with a light curve into the neck (If this makes any sense).
Unless you're planning on giving the current stuff more "Flow"...