Yep, there are lots of other options out there. I considered at least 4 or 5 off-the-shelf ones before committing to designing and building our own.
In Sonnet's case, it is super expensive and no denser than this: http://mk1manufacturing.com/store/cart.php?m=product_detail&...
We're able to achieve twice that density, which put it right on target with where I wanted to be. 44 of 48 switch ports utilized, almost all CDU outlets utilized, and ~13kW out of 14kW utilized under load.
