router or switch

i have a 1-ethernet port cable modem from comcast for my high speed connection…

i also have a desktop (with ethernet capability only) and a laptop (with both ethernet and wireless connectivity) that i use…

of course i can only have one connected at a time because it is only one port…

my question is which would be best…

to connect a wireless router (that’s what the isp recommends)…

or…

to get a two port switch…

or…

to get a usb router for the laptop…

or…

any other suggestions you may have so that i can have both computers connected at the same time…

thanks in advance for any suggestions…

-ehc