PARTIAL ANSWER:  We use Connected TLM as an incremental backup to sql for 700+ user desktops.. it doesn't restore the total PC image as you asked, yet it's darn good at what it does file by file restore.. based on helpdesk monitoring of 700+ users over 3 years. .. Perhaps you could use PXE to boot to a RIS server, install the image, then use connected to restore the files.. ?
Looking for Incremental Backup Software + bootable images + networkable (?)?