Pat Lee, has done some awesome artwork of the Transformers, I have 2 posters that he did, one of Optimus Prime, the other of Megatron with their respective Decepticon/Autobot insignias behind them. Also if your going transformers, the only stuff that counts to me, is anything before the movie... Voltron wise, the Lions are the only way to go, and if you can get sculpted lion heads as either the feet of the table, or on sides, by the control panels, that would be awesome... I was never a fan of the car version. For Voltron you could also go with one side being them all assembled. The other disassembled or the main villains big space ship, what was his name again? the other thing you may want to consider is with robots you could maybe do some cool LED stuff with their Eyes or something, when you turn on the Cab, where their eyes come to life, and glow.