Hooters I've got 4, I breifly managed to get it from 7 down to 3, but then I found the Razesa and fell in love, so now I've got 4.I try to keep it so all my bikes are somewhat different from one another, otherwise one would make another similar bike redundant. I think 3 is the perfect number for me, but I can't find one to part with.
I tend to go through periods where I prefer one and the others get neglected for a while. Right now I've been riding the winter beater for too long, and I'm longing to ride one of the other three that share my bedroom, but I'm waiting for nicer weather, the salt is murder on bikes, and that's why it's nice to have one dedicated to salty slushy riding. In the summer the winter beater will be reserved for rainy days (fenders) and hauling stuff (racks). The fixed gear and the Razesa are the fun bikes I choose most often, leaving the fuji cross as the most neglected one of the bunch, but it's also my most practical bike for long rides, so I can't really part with it either.
On topic, I like the Cinelli, but I think it's mostly because I dig the green and chrome, and the decals are less obnoxious. From the pics the Nago appears to have shorter chainstays, which might make it a bit more fun to ride, but that could just be an optical illusion. If they really are very similar, I'd go with the cheaper one first, all else being equal, I'd go with the pretty one.