Must be one of Pamela's travel companions. Please take a look at my response to the similar concern in the China forum. I really do believe that your concerns about traveling in China at this time are unwarranted. Here it is: http://www.tripadvisor.com/ShowForum-g294211-i642-China.html You will see that none of the posts are about China economic issues affecting travel.
To answer your question though, because China is such a huge country in terms of area compared to other Asian countries, no other can provide the variety of historical and scenic attractions that can be found in China. As to where else to go (I'm assuming you still mean in Asia), Vietnam is very popular, last year I visited Hanoi and took a 3D/2N cruise on nearby Halong Bay that easily beats a cruise on the Yangtze, in terns of beauty and enjoyment. My next Asian country will be Cambodia, specifically to visit Ankor Wat in Siem Reap, and Thailand has a lot to offer in terms of historical attractions, great beaches and plenty of islands to explore. But none of these, with the exception of Halong Bay, in my opinion, have the impact of the Great Wall, Terracotta Warriors, Guilin/Yangshuo Karst Landscape and terraced hillsides, or the beauty of Jiuzhaigou and Zhangjiajie National Parks, old towns like Pingyao, Lijiang, Fenghuang or the water towns around Shanghai.