Suggest you just by a gigabit switch. You can get them in 4 to 24+ port flavors and you can simply add addtional switch(s) if you didn't get enough ports on the first one. They are reasonably priced with 4-5 ports around $30-$40, 8 ports around $50-$60, etc. I run a switch on each floor (3 story house) to service multiple computers.
Bridging should work if you choose to go that way, but adds a whole new string of configuration issues.
Switches are plug and play....no configuration required!