TGHusker,
What Ehrman means, and he's very clear on this point, is that as far as preserving ancient texts go, the New Testament has a treasure trove of manuscripts, which is nice. Now where the problem comes in is not a single one of them is an autograph. They're copies of copies of copies. The really early texts are fragments, some no bigger than a business card. No two of them are identical. God's great plan apparently involved losing the 'inerrant word' to the sands of time. Why?
The gospels are realistic? In what sense? The walking on water? The dying and coming back to life? The tombs of Jerusalem breaking open and zombies roaming free? Appealing to conventions of genre to make this particular case is really, really reaching. And a ~40 year gap in time between events and written record may beat Alexander, but Alexander was a conquerer of the known world who has his face stamped on a coin. History literally falls apart for that era if he did not exist. Plus I'm unaware of anyone trying to convince the general population he rose from the dead or can save their souls.
I would also add that assuming for sake of argument we had four Gospels written a week after the final events of the New Testament, four seamless accounts that agreed on every detail of these strange events, I would still consider them insufficient evidence for the claim of resurrection (or any miracle). As Thomas Paine said, "miracles are evidence to the witness only and hearsay to everyone else."
That's what the whole NT is to us: vague, questionable hearsay.