I'm wanting to try Nordies in my Ibby SR605. I just missed out on a pair that @Hellzero advertised here recently. My (licenced) Barts are quite uninspiring. For saying that it is an active bass, it does not have a great voice. I think the Nordies might address that.
If you have already tried Nordstrand, I am keen to hear what you think of genuine Barts by comparison.