Currently have a Billion ADSL+2 Router/modem 7404 series - must be 6 years old.

Anyway it has served me well, firmware updated - but I think it's holding my internet speed back. Does anyone have any tweaks or inside information for these routers?

I'm also considering a new router, happy to stay with Billion but would like to know any comments on Billion or other recommendations etc anyone may have?

Cheers in advance.