What Lugia said. If this is the size of system you're committed to, you can't fill it up with enormous modules. You can, however, pick one "pet module" and then build up a more workable system around it. In this case, I'd ditch the Starlab... you already have FX in your 1u row. Consider how much more fun and useful this system would be if you replaced the Starlab with the following:

Klavis Twin Waves (8 hp)
XAOC Zadar (10 hp)
Another small VCA module (4 hp)
Any of a variety of other utilities (mixer, attenuator, etc.) (6 hp left)