well if u have wireless go with that because u dont have to deal with all the wires going everywhere. at this point and time a wired connection has a 100 mbps speed between ur router and ur wii. wireless comes in 3 common flavors. the cheapest, 802.11b has a speed of 11 mbps from ur router and wii. 802.11g has a speed of 54 mbps. and 802.11n which is ridiculously expensive has 108 mbps. The speed of your ISP is also a factor, example, obviously cable is faster than most dsl connections. im running over 802.11b and it seems to be running fine with no lag. If u can connect ur wii through a ethernet cable go ahead and do so but i dont think you'll see that much of an increase in speed.