if you like them both and you can't decide, what good are we? I'd break it down to what you're going to be doing 80% of the time with the bike. If it's primarily day riding with a trip or two during the year I'd go for the 520. If it's hauling groceries, cases of beer and touring, the LHT.
I've got an LHT, it really is a bus. Busses are good.