I had a kickass time yesterday driving a number of different cars ranging from a '02 Sienna XLE to an '03 Infiniti G35x. Here were some of my observations at the time:
The Infiniti was by far the most entertaining car to drive. Steering was well weighted, and the VQ35 sounded amazing when pushed. The handling was sublime, and ride comfort was in general excellent. The particular example that I drove had a black interior, which I think is a must for that particular generation of G35. Overall, I felt a bit sad when I had to get out of it. For around $18,000, I would not hesitate to buy one myself if I had the money.
The other car that I drove was an '03 Mercedes Benz C240 Elegance. The car was unexpectedly good in the way it drove. It did feel heavy the way that a Merc should, giving it a solid feel. The 2.6L V6 was nowhere near as powerful as the Infiniti, but it seemed a bit smoother and the throttle response seemed better calibrated than the sensitive Infiniti. Interior I thought was on par with the Infiniti, with decent quality plastics and a more elegant look. Certain areas seemed plasticy, but overall, a very nice place to be. Steering required some real effort, but it was perfectly acceptable.
Last car of the pack was an '02 Toyota Sienna. I was shocked to see how similar it drove to my car. Steering was predictably light (even over-boosted). The high center of gravity, flat seats, and soft suspension didn't help with the handling, but for its intended purpose, its probably one of the better choices in the minivan market. While each car took a bit of getting used to, I was able to drive the Sienna right on the go. The same applied for my friend who drove the Sienna when he drove my Tercel.
The best part of the day was when I "raced" my friend in the Infiniti with my Tercel. I may have
slightly lost that one, even though I sort of cheated off the lines
edit - Just a note that this was done in a large mall parking lot at night when it was closed.