I think Bills fans everywhere would feel better about Manuel if he were able to actually beat someone who wasn't a journeyman. I'll say it again, we're committing to an unknown commodity, one who hasn't been really tested. Tom Brady outshined Drew Bledsoe. Russell Wilson beat Whatshisface. Even RGIII had competition with Cousins, who were drafted together. So on and so forth. Unless you're Andrew Luck, which Manuel is not, a smart team will let two guys duke it out.
Stand corrected. I also remember, however, seeing a quote from Whaley that they would look at all options, including QB, and there actually being a thread here and a similar debate.