A good GM can leverage a high pick for more choices and still get the guy they have targeted when it's not an over-hyped QB.
I don't care what QB they bring in here, if the line cannot consistently protect him, he's going to struggle and most likely fail.
A good line can make a decent QB look good, and a good QB look great. And if you happen on a great QB with an awesome line, you are looking at a formula for long term success and Super Bowl potential.
I know McNair wants playoff contention in 2014 and does not want to be seen as a rebuild year, but that is either naively shortsighted or wishful thinking on his part. This team does not have a starting QB, does not have a HC, and most likely has to install a new offense. To expect immediate results is setting himself up. Yeah, it can happen, but let's not be ready to jump off bridges if immediate gratification is not satisfied.
I have no problem with a 2 year "rebuild" to re-stock players and fully implement new schemes. They will have high picks in every round, so do it right and make both the offensive and defensive lines something to build on for the long term future, IMO.