On 100Mbps ethernet you can easily get 80Mbps.
I have the sky provided router and it gets 97Mbps via ethernet doing transfers pc to pc. That's a 100Mbps ethernet.
& my fibre 80Mbps connection goes at full 80Mbps which amounts to around 9MB/s on a download
I even get full speeds using wireless and a macbook pro. My Wifi isn't full 300Mbps it's only 150Mbps (well 144).
So you should easily be ok!
That being said the Homehub (assuming BT) would also be fine! So don't worry. Homehub should also be ok via wifi under the right conditions and a wireless N wifi card that connects at around 150Mbps +
Edited by ukhardy07 (Sat 25-Aug-12 23:47:11)