1) Brakes (esp. front) should be the next step, then a better clutch. But, don't hurry on the clutch. Go ahead and abuse your stock clutch to death, then move to a better one.
2) It tends to get overlooked in discussions, but one of the reasons the Comptech blower is expensive is that it is based on the Whipple supercharger, which is easily the best unit available. Roots/Eaton blowers are cheaper, but that is for a good reason. They are not built as well and the fundamental design is inferior. The Whipple is the most volumetrically efficient and thermally efficient supercharger you can buy. Another reason is the engineering. To an inexperienced eye, their kit could have come from the factory. It is very well integrated and fits perfectly into the engine bay. My 2 cents.