You need to check out the MotorWeek IS300 "first drive" video on the home page here. I like the rim, but it may be too dark. I know that beauty is subjective, but I think you have to have chrome to balance out the brightness of the yellow. The car in the video is yellow, and it may be the lighting, but the rims look really dark, and it did not go well with the color.
Another place to look is tirerack.com you can pick your make and model and it will show you a picture of your car with the rims you pick on it. It does not have an IS on it yet, but I'm sure it will before long. Even if they don't have your exact rim you can usually find one close enough to get an idea.
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SBM IS300