Much better than the Lexus but it was too long ago to compare to the E70 X5. I had an e39 M5 at the time. I thought the event was a Car & Driver deal but it was fully Caddy sponsored and set up to show the RX330 weakness in handling. They also had a comparison between the CTS and the 225 HP 530i on a course with longer straights and few curves so you could not tell how much better the 530i handled than the CTS.

I just recalled one SRX trait I didn't like was very slow steering, You had to hand over hand a couple of times for any sharp turn. Fast fwd to my X5 50i with active steering and sharp curves are effortless 90 degree flicks of the wheel yet with sufficient road feel.

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Richard
Sir Snaps-a-lot, 9 Time Dragon Slayer (54 runs!)
2011 X5 50i Alpine White, Biege Nappa /Lt Poplar M Sport
2009 Z4 35i, Black Sapphire/Ivory-Black/Anthracite

Gone but not forgotten: '08 550i, '06 X3, '06 650i, '02 M5, '99 540i