sorry what exactly do you want to know?
If the current hardware does the job then I'd say leave it. Are you sure it's the router that's the bottleneck? The ADSL part of it will run at ADSL speed, i.e. a few Mbit/s, but the rest of the switch circuit should operate at full speed. Do you know which one you've got? (It'll probably be marked somewhere on the unit)
Also it might be worth letting us know where on the planet you are; this could make a difference to what's available.