I prefer a digital view camera because I like movements and stay mostly in the studio. If I weren't so averse to the dark room I would probably just use the 8 x 10 Sinar. Mind, I have never taken the view camera outside. Too lazy.
I lack the ability to shoot and run with any camera so, for me, taking quick shots is DSLR territory. However, I rarely care about those pictures. Useful souvenirs.
I suppose that is about where you are with the S2. Your DSLR handles souvenirs and you want S2 or better image quality for the shots you care about. Sadly, you miss the technical involvement that 4 x 5 gave you. I say sadly, because you will spend a bunch of money. If shift and front tilt for landscapes will solve the boredom, stick with the tech camera. If you really miss full movements and your interests are changing towards static studio work, look for something with standards. My 2 cents.