I've only ridden one 848 and that was a few years ago, so it wasn't an Evo. I was really impressed with the motor on that thing though. I think they had an aftermarket pipe on it, but the gearing was stock. Very smooth user-friendly power delivery. It tipped into the turns without any effort on my part and was still pretty maneuverable in the city. The styling is great, and it's not as uncomfortable as one might think. The 748 is brutal--the 848 was not something that I'd like to sit on for hours at a time, but it's definitely doable. If you want to bomb around the hills on it and hit the track once in a while, I could see it being fantastic. And I don't mean like, "is this real butter?" kind of fantastic, I mean like you want to drop your pants and do "bad things" to the bike type of fantastic. I'd be fine on it for my commute bike, and if I were to get one to replace the Monster that's probably the one I'd get. But that was NOT an Evo, and it's very likely that big ergo changes were made. I'm going to guess that the motor is as good or better though.
I don't know if I'd believe anyone saying that the maintenance intervals are like a Japanese bike though. It's still Italian and it's still a Ducati. Until one or both of those things changes I see a lot of time futzing around a shop.