I have same question as OP. Friends have recommended Explorient and RCrusoe. I looked at the Interlake site. I am not trying to cut corners but am looking for value. Have been to Beijing and Shanghai so those aren't high on the list. Interested in Xian, Chengdu, Guilin, Lhasa, and Silk Road along with extensions to Katmandu and Mongolia. Any recommendations for companies that might be good keeping it to around $300 per person per diem?

thanks,
Marc