No one can tell you this. The wifi router is one part of the setup, but no one here knows what kind of wifi traffic is close to you and what channels are available. BTW, why do you need 250mb to stream HD when most HD streams use ~20mb. The basic rate of Draft N is 65mbs. Combine this with two streams, 2rx 2tx antennas, and you have 130mbs and then double that for full duplex and that is how they come up with 270mbs (260mbs actually). There are some with a third antenna but they seem to be vanishing. Don't trust those reviews that state they get 250mb+, they are just looking at what the wifi driver is reporting.