It is not just the rushing total it is everything else that goes with the position. Some guys can run great they can't pickup blitzes worth a damn. I don't expect to break the bank I do think top 5 is not breaking the bank for an all around quality player. We have had our share of lousy RB since Emmitt retired the notion the position is easily replaced is not true.
All of this is true, Dooms, but it's not a cut and dry issue. Several factors play into replacing a guy like Emmitt. #22 was effective because the rest of his team was effective (not the least of which was a dominating O-line). Emmitt isn't in the HOF if he spends his entire career with the Arizona Cardinals.
The laundry list of RBs that have strolled through here since Emmitt left haven't had the luxury that Murray experiences now. Dominant O-line, #1 WR in the NFL, savvy veteran QB that's gunning it like a well trained sniper, HOF TE. A lot of stars are aligning for Murray that haven't aligned for any back SINCE Emmitt Smith.
Now, that's not to say that Murray isn't exceptional. I think he is but he has more yardage before contact than many backs in the NFL have from scrimmage period. Some of that is Murray but most of that is blocking. Murray brings a lot to the table and I hope that he's re-signed on a reasonable deal. If he can't be, I don't think that he'll be as hard to replace as Emmitt due to the current factors listed above. That doesn't mean that we can just throw any scrub in there and he'll put up Murray's numbers but I don't think we'll end up chasing unicorns in an effort to continue with an effective running game in the absence of Demarco Murray.
With all that said, let's hope a good deal for both sides can be reached.