Lexus has a refreshingly simple selection process for its GS 350, with no traditional trim levels to choose from. Instead, there’s a single trim level plus available option packages. Under the hood of each GS 350, a 3.5-liter V6 produces 311 horsepower and 280 pound-feet of torque (up from 306 hp and 277 pound-feet). The sedan comes standard with rear-wheel drive, but an all-wheel-drive system is available. Rear-drive models use an eight-speed automatic transmission, while AWD sedans get a six-speed unit. Paddle shifters are included. Acceleration to 60 mph takes 5.6 seconds, according to Lexus. In rear-wheel drive guise, the GS 350 starts out at $50,940 (including destination charge); its all-wheel drive variant starts at $51,410. Yes, all-wheel drive adds just $470 to the price. In standard form, the GS 350 comes well-equipped with 18-inch alloy wheels, bi-LED headlights and running lights, wood interior trim, leather seat upholstery and interior trim, 10-way power front seats, Bluetooth, pushbutton start, Siri Eyes Free, and a 12-speaker audio system. A sunroof and rearview camera also are standard. Options for the GS include a head-up display, Intuitive Parking Assist, a power trunk lid, and a Mark Levinson surround-sound audio system with 15 Green Edge speakers and 835-watt output.