The Fredenstein Bento 8 offers a linear power supply that accommodates up to eight 500 series modules, and rack mountable in it's 3U format. This is a nice middle ground between the Bento 6 and Bento 10.
The Fredenstein Bento 8 Pro offers all the same features of the Bento 8, but includes the additions of a selectable stereo or dual mono monitoring output, a headphone output, and two VU meters.
Both the Bento 8 and 8 Pro feature Fredenstein's staple linking switches, which are handy for linking modules for stereo/buss processing, as well as creating "channel strips". The Fredenstein Bento 8 and Bento 8 Pro are expected to start shipping in March this year.