I like Lahm. But with his arrival, Rafael would have less chances and this could interrupt his evolution.
His value is another problem. He's highly rated by bayern, and i don't think they'll ask a "fair price". And i don't think we need more defenders.
All players make mistakes even Giggs, Neville, Scholes, Edwin, Rio etc. still make mistakes, they just get picked on more because they're young, must stick by these youngsters. Rafael is class already and can still get better, remember that prior to getting sent off against Bayern, he kept Rubbery at bay. In my opinion he could become one of the best modern day right backs and if people say Fabio is better he could become better than Evra, I feel Fabio is being held back by Evra being ever present, would a loan for Fabio make sense?