You will want this beer to sit for a while. With that said, aging beers lose bitterness over time. Depending on when you plan on drinking this, and whether or not you want a more malty or balanced RIS, you may want to actually increase the bitterness. I'm sure someone around here can give you better numbers, but I think you can expect to lose about 5-10% of the apparent bitterness of a beer per year. Unless you ferment this pretty cool (~60*F), the beer will probably be too hot for no less than six months. Unfortunately that means you'll lose most of the flavor and aroma qualities from the Goldings.
Personally, I would up the roasted barley to 2lb or more and the chocolate to at least 1lb. These beers are ridiculously roasty. I think that you may end up a little unsatisfied if the beer doesn't have enough roasted quality. Additionally, I would aim for an IBU:OG ratio of 1. That way, in three years, you can open one of these and show off your slightly malty, well aged lovely gems.
That's my two cents.
