If you're fed up with muesli or just don't like it, try Alara Organic Active. Its truly wonderful - it's gluten free too if that's important to you.
It's a mix of quinoa, amaranth, apple and prebiotic yacon. Fantastic.
I've just been on their site and they've won lots of awards and have great business principles. Do take a look.
I've just noticed you can even make your own muesli by choosing from a list of 60 ingredients and telling them the proportion - bespoke muesli wow!