This is my first Lexus, a GS 350. My previous cars were 335 BMW cpe and 330 BMW, and before those an '05 Viper (can't compare that beast). I test drove the RL, MB 350 and the BMW 550. I made my choice based on comfort, ride, looks and price. It was a toss up with the MB but I took the Lexus at 5k cheaper and w/ more equip. My car was hard to find w/ the ML stereo, silver ext and blk int and only two were available in the entire state with that setup. So far it's great! The Nav blows the BMW iDrive away and so easy to use. The seats are so comfortable. Hope this helps!
Seats, nav, looks, and overall fit and finish.
A must: trade out the Yokohama Avan A-10 OEM tires for something else. I got the Michelin Pilot A/S and so much better. The Yokos made too much NOISE.