For the small company setting up a network or similar, bear in mind there is no consumer protection to speak of and support provided by the bigger name manufacturers are normally through an appointed local agent, not the company itself. There are a few well known computer centres, one in Wan Chai, all things computer, including PDA's and digital cameras. Another smaller one is in Windsor House in Causeway Bay, both are on Hong Kong Island. The others are Kowloon side, one in Mong Kok near the Ladies Market that mainly has consumables. The other is in Sham Shui Po, Golden Computer Centre also maybe also known as Golden Shopping Centre, it's got everything, right opposite an MTR exit. Large electrical retailers such as Fortress and Broadway sell mainly computers, including Mac's and printers. Local consultancies although may be very good technically, getting across what you want can be an issue. There are an increasing number of English speaking IT consultants providing a range of solutions as an alternative.