I order from Universal Cycles for most of my large orders. You'll talk to Mike or Schmitty and if you shoot the ****, they'll usually give you some sort of shipping discount if you ask nicely. Ben's cycle is also pretty good. I've also used speedgoat, bike bling, and as of today, outside outfitters for a Nitto NJS Pearl 90mm (25.4) for $68.

Most will price match, but universal cycles typically has the best inventory. Jenson is good, I've only ordered from Nashbar once and it was fine.