Serottas are really, really nice frames - although some of the custom ones can have pretty goofy geometries. They also are extremely expensive when bought new, but you can find some surprisingly good values for used Serotta frames. Quite a few of my riding buddies have Serottas and they are very cliquish about their bikes, but I wouldn't hesitate to buy one if the price was right. Unfortunately, their new frames are way out of my league.