Bish: this kit has the TOGS box, so I would think it's at least a Mk2, sound right? I'm thinking I'll need to add the scalloped reinforcements along the turret right front joins, and maybe rearrange the onboard tool storage, but I'll wait to do that until the books show up. I think the turret side stowage box would look good on it too, but waiting there as well.
Regarding noise: I've heard M113's on FMC's test track, but they were not "stock", and Merkava's at about 200 yds distance. The Merks were loud even that far away.