I would drop some of the chocolate. That might end up being too roasty. I also think that might be too much victory malt...a little of that can go a long way. I would also drop that carapils...just mash higher if you think you need more body (although 154 should be good).
Here is the brown I did last week. I tasted it at 4 days into fermentation and it was great.
EDIT: I was going for a Northern Brown, so I think your base malt amount and choice of crystal malts are good for a Southern.