We have just been through a 3 month review of several systems, but the two that stood out were Optim (Philips) and E-MAT (Barwick Systems Ltd.).
After carefully weighing up the pros, cons and speaking to several existing users of both systems at numerous sites, including a visit or two and looking at the costs involved (short & mid-term) along with the on-going benefits we came to our carefully considered conclusion.
Out of the two systems we chose E-MAT and are currently working with the data and development to suit our site, here at Trafford, prior to launch.
If you're interested in reviewing our findings, I could probably make our report available to you.
Email me if it is of interest.