I hiaghly recommend Neventum services, I have worked with them a couple of times and they have the capacity to adapt their proposals to the needs you have for each event.
InterEx Exhibits, founded in 1993, is a full-service exhibit company that specializes in the design, fabrication, management and service of custom trade show exhibits, point-of-purchase displays, and retail interior fixtures. The Company has become one of the most respected exhibit manufacturers in the country, and has emerged to become a recognized leader in the trade show industry. InterEx has earned major awards for innovation and impact for exhibit design. Their talented design staff develops environments that communicate the brand identity, marketing message, and display objectives.