Greenridge, it all depends on what you consider to be rough. If you like the way your 5 rides and handles with the stock set up, and you are not willing to sacrifice any ride harshness for improved looks, steering response, cornering grip, high-speed stability, etc., then leave it alone. I can say for me I like the benefits of a plus 2 or 3-wheel & tire upgrade over the increased harshness (only readily apparent on rough roads, smooth roads are okay). I have driven lowered vehicles (usually 2" lower than stock) with 17" or 18" wheels (40-series, and 35-series profile tires) since 1996, and have accumulated some 300,000 miles with this type of set up, but I really enjoy driving, and cornering, and driving, and cornering, and did I mention just driving in general. So for me, it is absolutely worth it to go bigger, and the ride, for me, is not that bad at all. Also, I do not have back problems, and at last measure I am still 6' tall. Hope this is helpful. Later.