I've used both Linksys (BEFSR) and Belkin (gateway router). Both were easy to set up and invisible in use. Both claim to support over 200 users - but I've not tested that! They plug into my NTL broadband set top box/cable modem.
The Linksys failed shortly before its first birthday and fault diagnosis was not straightforward. The helpline was good (if repetetive). However when the replacement was sent out it had a European PSU. This was a significant problem as the PSU was the underlying fault !!
The Belkin has performed faultlessly for two months, thus I have not tried out their support. It has four ports built in so you would only need a switch to provide two extra.
My instinct is to prefer the Belkin. Others will doubtlessly disagree and have good reason for so doing.
How times have changed - when I was at Uni people had to go to the computer building to book their time slot on the computer!