5 port
http://www.ebuyer.com/184892-zyxel-d...91-010-186004b
or 8 port one (recommended if your going to have more later on)
http://www.ebuyer.com/185149-zyxel-d...91-010-187004b
think them zyxel ones look like they are made of metal casing as well so should be cooler
or any other gigabit switch, as they are unmanaged switches does not matter witch one you get really just go with the one with the amount of ports needed norm i recommend 8 port as you lose 1 port on the SH and 1 port on the gigabit Switch
with 5 port switches your only getting 3 extra ports due to the above