Starting QB in 08

I think it's pretty clear that the starting Quarterback for 08 is most likely on the roster today. There are a number of possible scenarios.

1. We grab a free agent/trade for a QB -- In this scenario, we'd most likely be starting whomever we bring in, but it doesn't look like McNabb is going anywhere and the Bears aren't in the "looking for one last piece" mode that leads to high draft picks being slung around for say a Derek Anderson.

2. We Draft a QB on day one -- Even if we do it's unlikely he'll start in his rookie year, so we'll be starting someone currently on the roster.

3. We Draft a QB lower in the draft -- see 2 but with 0 chance to start.

4. We have exactly the same set of QB's we have already.

Given that though who starts?
I think this comes down to whether or not Rex signs with the Bears next year, if he does I think we'll see an open competition between him and Kyle for the starting job, and a of right now, I think it's likely Rex would start.
If some other team places significant value on Rex, I think he's gone and Orton starts next year, we'd either then draft a QB on day one (depending on how the draft plays out) or in one of the later rounds as a project.
I think Griese will be on the roster going into next year in either scenario.

I doubt very much Rex will still be a free agent come draft day, so we should have a pretty good idea who's going to be under center next year in March.