hope you have a great holiday. One place that is well worth a visit and is only a few minutes from Sidari is Peraloudas. The two beaches (Sunset Beach - also seems to be called Longas beach and Cape Drastis) are amazing. Beach is much quieter than Sidari, with towering cliffs, pure sand and crashing waves, unlike many other corfu beaches. The taverna at the top is also excellent with the best fresh squeezed orange juice in Corfu!
I'm sure once you've been once you'll be hooked like the rest of us
Bronwen and Brian xx