alecwilcox :
I also need the Switch to combine two Ethernet cables into one.
You need a switch that supports link aggregation, aka etherchannel, aka port channel, aka 802.11ad, aka LAGP, aka LACP.
which is pretty much all managed switches.
I'd try and grab a used cisco 3750 if you are comfortable configuring it. Its a powerfull l3 switch.
if you just want a user friendly switch basically anything for the right price with a web gui will do.
IF you are planning to use this in a home though you need something fanless probably ?