Just traded my 2003 E500 for the GS430. NO Comparison. The Lexus performs as good as the E500, unless you are "throwing it around", which I stopped doing ages ago. The technology, build quality & reliability makes this a clear choice over the E-Class. This is a great looking, great performing, tech-laden car that looks great and is a blast to drive. Put aside the preconceived notions about European and Japanese cars (I know that's hard as I HATED parting with my Benz), drive a loaded GS430 and an E500 and you'll buy the Lexus. Especially when you realize that alhough these the cars are in the same class, a comparably equiped E500 will cost you a LOT more, & it won't be NEAR as reliable.
The tech is awesome. From the voice operated features, to the bluetooth. I never fumble for my keys or my phone. I walk around with my fab and my Razr in my pocket, walk to my car...it unlocks, starts, recognizes my phone and all I have to do is sit down and push a button.
The brakes ARE a bit grabby, but then so are the E500's. The XM radio is a must, but the dealer installed antenna leaves a lot to be desired. Have dealer install INSIDE on rear deck, unless you are tinting the back window, or ordering the rear sunshade. They need to go to a rear mounted fin antenna