I'll knock out Park City and Breck tomorrow. Sun Peaks is a completely different beast than Breck. The attraction of Sun Peaks is the myriad of super friendly people, you and your family, can meet and ski with every day, just by posting in MS's forum. You can also socialize with them at night. All, If that's important to you. If you're bringing your own big group. Or prefer keeping to yourself. Then Breck edges out Sun Peaks, due to the superior terrain. imo.