Thank you all! I have noted all your activity and food suggestions and will start some research. We are continuing on to Cairo for a 10-day guided small group tour (booked mostly with safety in mind, I hate tours) and accommodations and food are sure to be less than stellar according to reviews. So we are especially looking forward to good food and accommodations in Zurich before hitting Egypt. I opted for the Zurich Marriott, but was torn between that and the Renaissance Tower. Location-wise, the Renaissance seems farther away from the City Center but I'm still wondering if it's far enough away to merit using points on the Cat 6 Zurich Marriott versus a free night certificate for Renaissance Tower, a Cat 5.