Hi froggy and welcome to the site. If you can find a used 919 somewhere, by all means go for a ride. Last year I moved from an ST1300 to a 919 and couldn't be happier. The FJR, like the ST, is a heavy touring oriented bike. I've logged many miles on an FJR too and it will carve turns nicely. But the touring rigs are nowhere near as light and nimble as the naked standards. For me, the ST was overkill since I wasn't touring much and wasn't doing any 2-up riding. Might be a good idea to figure out what you want your bike to for you, take some test rides, and then make the plunge!
2009 Honda Goldwing
Four wheels move the body. Two wheels move the soul.