Galileo LE is pretty old technology (for SR at least): uses the old MPC-based active shielding, no graphene, etc. Galileo SX has many advancements and sounds like it. If you do decide to try the LE, price needs to be very low as resale is very difficult.
SR’s power cords and power conditioners are where they really shine. I agree with several others here that power cords make the most improvement in sound so if you don’t already have excellent PCs, I recommend you start there to make a substantial improvement in your system’s sound.
If you have decided that you really need another pair of world-class ICs, consider Stage III Concepts.