We used to have Konica Minolta. It is overkill for us, I think. Anyone feedback is welcome.
You can get an Konica Minolta higher end office unit with a Fiery on it...consider the bizhub C659 or C759. They both support 300gsm through the bypass, offer a high capacity paper deck, and you can add all of the common finishing. Make sure to request an ES-2000 spectrophotometer so you can match the spot colors as you mentioned, along with keeping your printer calibrated for best color output.