Many things to consider.
Film has a look to it that digital does not produce. A DSLR and a MFDB are for the sizes of prints you mentioned pretty much equivalent and have a similar look.
To help you get an initial idea of the high end 35mm DSLR vs the 80mp backs take a look at this article. It's written by anIQ180 owner and landscape photographer.
http://www.circleofconfusion.ie/d800e-vs-phase-one-iq180/So I would say that the first thing you need to consider is why you like your MF film work more. It may be more about the look of film.
The next thing to consider is what software you are using. The v700 is a good scanner and excellent when used with negative film (color and black and white)
and with the right software. Silverfast software for the v700 improves the results you can get with the v700. You can also do wet mount scanning with the v700 with a wet mount kit.
The Hasselblad scanner is very good and curves the film so as to get a more accurate focus avoiding the need for wet scans.
Then you should also consider the costs. A digital back that will exceed the quality of a high end dslr will be expensive. You will be looking at a 60PM back for that.
If you like film there is a lot you can do with the price of a MF digital back.
A few thoughts:
A 6x17 panoramic film camera.
A 6x8 Fuji camera with tilt and shift lenses that go from 50mm to 500mm (all tilt shift)
A Giga Pan for shooting automated stitch panoramic shots. You can literally take landscapes that are 100s of MP with a virtual format bugger than 4x5 film.
An 8x10 film camera.
If you don't like dealing with film though that's a different story. A digital back will be more immediate and if you shoot very large amounts of film it
will pay for itself in the long run.
I enjoy film and it's my preferred medium. SLR Fuji gx680 or my Toyo View 8x10 shooting film or direct to paper.
Here are a couple of examples to give you an idea of what the v700 with Silverfast software can do.
6x8 film
crop from the same negative.
6x8 film
crop from the same negative.
6x8 film
Crop from above.
These scans were done with a v750 (same as the v700, but includes silverfast software) and they are dry scans.
Direct to paper
Direct to paper playing around with imitating vintage techniques.
I'll see if I can fish out some landscapes for you to see too.