The HL-20 would be the best choice.
Below is an excerpt from the HL-20 link in my other post.
"The Vehicle Analysis Branch began investigation of the Soviet BOR-4. Small models were tested in NASA wind tunnels and demonstrated that the vehicle had good aerodynamic characteristics throughout the speed range from orbital entry interface to low supersonic speeds. The Soviet design had a 2,040 km cross-range capability and an outstandingly benign thermal profile at peak heating conditions."
The low thermal profile during peak heating conditions is a safety feature which can't be passed up. And like I said before, It's already been designed!