The Juliana is a great bike. I remember my first ride on it. I felt like I was floating over the trails. For me, the short top tube works, and I like the smaller diameter handlebars. Never been on a Racer-X, but I would love to try one. I hear nothing but good stuff about them.

Though I still have the Juliana, I'm currently riding an xs Blur XC, which is a super bike. Though it's more work to maintain than the Juliana, I feel a noticable difference in climbing and cornering versus the Juliana.

I don't think you could go wrong with anything Santa Cruz or Titus!