Routers - Thinking of buying a new one?

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.

The Apple Airport Extreme base station is a very good router and comes with dual bands. It sells for $179 here in the US direct from Apple. It's best to buy a router that is compatible with whatever system your ISP is using so keep that in mind when you shop around.