More Rapid Fire MTOE (modified table of organization & equipment) madness from Sound Officer's Call. Did I ever mention that one of the things I love about Rapid Fire rules are the fact that you don't have to have an absurd amount of miniatures for a great game?
FM 100-60 provides detailed equipment lists for Soviet-styled Opposing Force Tank Battalions and gives you the options for the smaller battalions of 31 tanks, up to larger battalions of 44 tanks, etc.
Here is the standard configuration for a Soviet-styled tank battalion:
3 line companies and a hqs give a total of 31 tanks. RF-speak that equates to companies of 2 tanks each, and battalions of 6 tank models.
The Headquarters has a reconnaissance vehicle and a command vehicle, which could be adequately represented by a BTR or a BMP model if you are so inclined, or you could theoretically consolidate all your recce assets into 1 stand for the entire brigade (this is a much cleaner option). I would imagine most of the battalions in a tank brigade would not operate too far from each other so a consolidated recce stand would be appropriate.
Speaking of Brigade, if you're talking a tank division, here are the units you would have:
A HQs (and accompanying support elements) which will be the subject of another post, but if you want to assemble the perfect WP tank brigade from a tank division, you'll need 3 tank battalions (18 total models), a mech infantry battalion, and a SP howitzer battalion.