The all time (but not kid budget …) favorite is
ducduc Dylan Ultra Modern Crib Modular System

But I love as much The Oeuf Toddler Bed, and this is only ~500$ instead of 6.000$ for ducduc … 54″long x 30″wide
It might be a bit small for our “big girl”, it’s 54″long x 30″wide …
We have to check it in some store, and it seems that there might be quite a few Bay Area stores that carry it.

The new Petra Toddler Bed is an extension of Argington’s line of Baltic birch children’s furniture. I like this line and especially this bed. Also, it’s in upper 300$, or rather almost 400$ 🙂
In any case, I like this bed more and more every day and from their whereabouts seems like the closest store to Bay Area that has it is Goodnite Moon in Corte Madera …
Dimensions are 60″ x 36″, headboard is 20″ high, platform is only 8″ high for safety and ease.