If you like the Bonnie but want a nice interior, get an Aurora. They're in your price range, on the low end, and I'm always asked what kind of Lexus it is when people see the interior. They handle great. There are a lot of little thoughtful details in it, to the extent that I learned something new and cool about it almost every day for the first year.
Trade-offs: 3.5 has better weight distribution, and the gas tank has 1 more gallon of capacity vs. the 4.0. The 4.0 compensates for the added weight of the V8 by reducing the fuel tank a gallon and adding an aluminum rear decklid. The 6 has fantastic power; I highly doubt you'd miss the 8. I got the 6. HOWEVER...the transmission with the 3.5 is a known weak point with solenoids and throttle position sensors that commonly go bad. I've been lucky, but repairs could be expensive.
Both models: like the Bonneville, rear window regulators are an issue because those rear windows are large and expansive, and thus the regulators are prone to failure due to the weight of the glass. I've had to replace one, but it wasn't too bad. Check out the Aurora Club of North America for more information on things, but I want to leave you with my verdict:
I LOVE MY CAR, I DON'T WANT TO EVER GET RID OF IT!!
It is a VERY satisfying car to drive. Just do your due diligence and make sure you get a good one. They seem to be either problem-free or a complete money pit, nothing in-between. But I got a good one and I love it!