Thoughts on Dell PowerVault 124T, and alternative

My company is thinking about purchasing a new Dell PowerVault 124T Autoloader. I wanted to know before we bought it what were your thoughts on the product, and if there is a better alternative.

Companies Requirements:

550GB of Storage
Automatic Loading
Easy to manage software exec agents


Whats it going to be backing up? Connection type etc? We use 2 Powervault 136T libraries with 4 drives in each, struggles to do 2TB a night over network