There is a preview of the Hobby Boss Merkava 3D on Perth now:
http://www.perthmilitarymodelling.com/reviews/vehicles/hobbyboss/hb82441.html
Looks very promising-- a big difference is real ball-chain versus the cast sytrene for the Meng kit. Also appears to have anti-slip surfacing. Looks like they dropped the vinyl wheels for full cast styrene. I don't see any clear parts like the Hobby Boss Merkava 4 had; I wish those had been included.