Just to be contrary, since I've moved to a digital only sub for the Prog, I actually find it harder
to dig out old stories. For a one-off Dredd or a Future Shock, digital is easier. And if I have a digital collection, it's perfect (Red Seas and Caballistics, I'm looking at you!) But if, say, I want to re-read the Order, I have to download 24 Progs (not usually enough room on my tablet to do them all at once), then open each one, fiddle a bit to find the right page, close, open next prog, hunt for the page etc.
Getting a stack of progs out of my attic to re-read, say, Michael Fleisher's run on Fr1day*, feels much more user-friendly in terms of flipping through the paper progs from one epsiode to the next.
All that said, I would consider getting a print and digital sub combined for a slight price increase over the print only. Like, £5-£10 more. And a free Graphic Novel download as an incentive.
*The things I do for my blog http://heroesof2000ad.blogspot.co.uk/