Hi Storm
Love the Clipper (I'm currently 10kly away and on my way to the core in one), one of my favourite ships. I'd probably go for large Pulse lasers as Stressfest suggested. Beams and Bursts are devastating but can cause overheating and quickly run down the power. I went for the Prismatics aswell but found them not to be a good option for the Clipper as they really are very power hungry (you'd probably have to go to Pulse Lasers aswell) and increase mass substantially. The A7 Prismatic weighs 160t if memory serves! Which (depending on build) can really effect the Clipper's two best attributes, speed and maneuverability. You could drop to the A6 Prismatic but that weighs the same as a standard A7 (80t), draws more power and is a fraction weaker.
Prismatics do work on some other ships but I found them not to be suited to the Clipper. But have a play as you don't lose money on selling modules, and if you do come up with a workable build please let me know, I'd be really interested in having a look
All the best with your new Clipper anyway, it really is a great ship to fly!