Under $4K, I think it's the RBL, hands down. If you can find a nice Parker Repro in the right configuration under $4K, buy it. With some serious looking, you could find a nice Spanish gun. I have seen NIB AOC/SG (Uggies) on auction sites for $2500, even before prices softened, and the standard Uggie boxlocks can be had for less than that. They are very good guns, and can hold their own with the RBL and Parker Repro.