When Hallmark Services Corp. was looking for space that would accommodate both its headquarters and call center operations, it narrowed its choices down to two existing buildings and a built-to-suit option on existing space. It finally decided on M&J Wilkow's Naperville Woods Office Center, a 492,000-square-foot office complex 30 miles west of downtown Chicago, to save $7 million over the built-to-suit space and accommodate its long-term growth plans.