I agree on the pricing issue, but the problem I have found looking through tirerack.com is that although they show a ton of different tires, almost all of them only come in white letter or white outline letter in the size for the RX300. Last time I bought the Goodyear Integrity's, even though they had bad ratings because that was just about all I could find. My RX came with Michelin LTX M/S but I had to take them off after 15K because the howling was driving me crazy. Now I am in need of new tires (50K) and the situation is about the same - the tires with good reviews have white letters and the ones with bad reviews have blackwalls. I don't think an RX300 would look right with white letter tires.
I am open to suggestion.