Welcome Averc... and are you looking for an airsoft gun or plan on infrared battling with your tank? Do you plan on taking on the scale modeling aspect, modifying your tank with all the bells and whistles, or just want a tank to play with right out of the box? Primary use inside or outside?

As said, Tamiya and Heng Long for 1/16 scale, but remember Tamiya is IR only and Heng Long are airsoft in their stock packages. If you want a smaller scale tank, very good quality, in either airsoft or IR there are the VSTank models. Hard shooting airsoft, but the IR is in a league of it's own and not Tamiya compatible if that is what you are looking for, but because of the smaller scale do not operate well in grass.

There are lots of options out there, and all of them are represented here by someone with the same interests.