I've got the JB Grand Raid, it's a bit longer and wider than the standard JB RTT.
These are not cheap @ $4.8k but you do get what you pay for. If being able to see the moon at night through the fibreglass is OK, then buy a Chinese one.
The only issue I have with the JB is that the gas struts are very stiff and its a pain to close up, but the reason they are so stiff is that they will handle a120km/hr wind. Finish is excellent. The service from the importers is better. I would buy another one based on the after sales service alone.
Pete

