Like many of you, I am disappointed by Toyota's decision to not offer the Prius V with a factory installed sunroof -- although I understand the reasons for this decision. One response to this situation which a number of Prius owners and dealers -- at least in Southern California -- have apparently pursued is to equip Prius IVs with 17" or larger wheels. While I have read numerous posts on this topic, I cannot find one that compares the driving experience of a Prius V to a modified IV. I am particularly curious to this feedback since, in addition to lower profile wheels, a Prius V also has a quicker steering ratio and a modified suspension set-up -- two items that are not easy to modify. A test drive has convinced me that the Prius V offers a more responsive driving experience than other models and I am curious as to how much of a trade-off to the Prius V drive I might real realize if I elect instead to put larger wheels on a Prius IV. I am getting ready to buy a new Prius this weekend and any insight would be much appreciated.