IPA (or any beer, really) from the can is fantastic. im really glad breweries are realizing this. two of my favorite canned IPAs: Ghandi Bot (New England Brewing), and Gubna (Oskar Blues). 
I actually hadn't thought about pairing e-juice and beer.
I've had some Caldera IPA in cans the past few nights with my Orange Mint custom mix from Gourmet Vapor and it does indeed go pretty well, I hadn't even considered the citrus factor of both the IPA and the juice.
I'd be mostly inclined to say tobacco flavors would be the best, something about an analog and beer going hand in hand.