Honestly, I would just go gigabit. If you're going to be transferring stuff between computers (think Steam backups) 100mbps converts to about 12 mb/s, whereas Gigabit (1000mbps) is about 10 times faster.

A few other people have linked various switches in this thread, haven't seen this one mentioned yet though.

For the extra $6, go with this one. It's the 8 port version of that switch. I've been using one for years with no issues, and that way when you want to add a 5th, 6th or 7th seat, there's no extra headache.