The RX 330 is the successor to the RX 300, still the best-selling Lexus model after five years on the market (without the use of incentives). And after spending several hours with the new RX, we have no qualms about saying to current owners: You'll love it.Everything people found so endearing about the first RX --- the elevated stance, forgiving ride, smooth drivetrain and luxurious cabin --- is intact. But Lexus, noting competition from the Acura MDX, BMW X5 3.0i and Volvo XC90, has refined the package in ways that should appeal to buyers, certainly those who have an RX 300 coming off lease. During our drive, we took note of the roomier interior with even classier furnishings, better ergonomics and additional convenience and safety features. We also noted the 330's stronger performance provided by a new 3.3-liter V6 and a reengineered suspension that yields tighter handling around corners without compromising its plush ride quality. @@@ COME OWN DOWN FOR A TEST DRIVE@@@