tua by ko i would go for solis but i dont think he has the discipline to box for twelve rounds i think he would stand in front off tua and pay the price
If Tua is in shape he is a major threat for anyone other than the Klitschkos. I am not sold on Solis yet but if he could beat Tua I would be impressed.
It would be awesome to watch but tua would win as long as if he was in good shape and motivated (not the tua from the lewis fight)