As of January 2013 I am now using a Starlight Xpress SXVR-H9 monochrome camera for guiding in conjunction with my Starlight Xpress Active Optics (AO) unit. The H9 camera uses the same SX Universal driver in MaxIm DL as the Lodestar which enables selection and control of an AO unit.
The H9 camera uses the sensitive Sony ICX285AL Exview HAD CCD with square 6.45um pixels and an image format of 1392 x 1040 pixels. Operating at bin x2 the SXVR-H9 has a plate scale of 2.96 arc sec (compared to 3.85 arc sec for the Lodestar) with a field-of-view that is almost twice the area of the Lodestar. Results so far suggest the increased resolution and larger field-of-view offer tangible benefits both to guiding precision and guide star selection. I am now able to find guide stars more easily in the sparse star fields around galaxies.