My road bike and my wife's road bike both came with Ultrasports. Very nice rolling tire but flat prone and not long lasting (less than 2K miles before mine was worn down to the belts). Replaced with Gatorskins on both and they've been great. Pro Bike Kit has them for under $30 each with free S+H.

I have 23s on our road bikes and 28s on my commuter. Big difference in feel.