Note that those 1/48th moulds seem to have been passed around between companies - I have a T-72 and a Merkava from that range which I bought in Academy-branded boxes. So you might improve your chances of finding some if you look for Academy as well as for Tamiya.
Beyond that, I agree with Carlos that they are eminently suitable as gaming models. They are very robust and hefty (especially if you don't remove the motor block, which is a bit tricky anyway as the drive wheels and motor form a single unit IIRC), and the upper hull detail is quite crisp, yet robust enough to only require the usual painting techniques and not that fancy-pants airbrushing and pastels stuff.
The only issue might be that they are quite large, so they might not match too well with smaller 25-28 ranges. No problem with Black Scorpion or such, and I am not too picky (and prefer my vehicles a bit on the larger side, too) when it comes to scale, but the simplified, robust running gear and lower hull is quite a chunk.