Size matters!!!
If you are going to do a lot of enlargements beyound 8x10, digital is going to be more difficult, or at least more expensive. More difficult because you can't do the printing at home, and must travel somewhere during somebody else's hours. You can't run into their shop at midnight when the bug bites you to do a print. What you can do with digital is scan your negative, PS it to your satisfaction, and have it ready to take to a pro shop for printing larger than 8x10. You then don't have to worry about keeping the chemicals fresh or use them just because they will go stale if you don't. Gee, maybe not so expensive after all
If you have used a darkroom, you already know how much fun and how much frustration there is to that. Especially b/w is fun to do. Color is too, but takes more experience (read that expense) I think.
I would guess you need to consider what your shooting and printing habits are, or are likely to be with either option. Then do a cost analysis. Don't be too sure you will do a lot of large prints just because you can. Even so, letting someone else do it does have advantages in time, expense and effort. It gets back to volume.
There has been some discussion on this in the Popular Photography and Imaging (PP&I) forums in the last six months or so. You might wish to do a search over there, or ask the question again. I think there are some there who have actual experience with doing the math to make the dicision. If it looks even, then you only have to consider which is esthetically more attractive to you.
BTW, what Durst are you looking at for $1000? Are you looking at 4x5 or 8x10 negatives? Or, am I just that far out of the loop on what a 35mm Durst should cost
Edit: The more I think about this, the more I realize that a lot will have to do with your printing desires. Darkroom and digital both have advantages and disadvantages. Even doing 8x10 or less at home you have to figure the cost of inks, getting up to speed on PS, and the time on the computer versus equipment and chemicals for the darkroom, as well as time in the darkroom. I am inclined to think digital, even for the larger prints might be cheaper, if not as satisfying.
Well, get thee to PP&I and ask those who have wrestled with this professionally, that is, those who are in the business, and had to decide based on profit.
(The more I look at this post, the more I think I have just muddied the water)