Can you provide the following:
1. Do you have any brand name preference
2. What do you want to do with your SUV after "5 - 8" years. I.e. do you plan to TRADE in your car for a new one? (Then CAR residual value is important).
3. "预算55K左右" is CASH, or finance, (definitely not LEASE)
4. Engine size (that prize range can have V6 SUV)
5. AWD ?
6. any "Must Have" features?
Other concerns:
1. Reliability - no car is free of problem, a reliable car is much cheaper to maintain in the LONG run. Usually cars are trouble in the first five years (within warranty), and problems start to come out after warranty expires. Don't trust extended warranty.
2. Do you know any honest mechanic, maybe you need one after warranty expires (service at dealer is relatively more expensive).
There are sites with articles on cars. Those writers usually have tested drive those cars (some may drive the car for three months before writing the article). They are relatively more objective in their writing (we all have limited access to different cars, and experience).
My two cents.
Good luck.