Personally I'd plump for a netscreen 5GT ADSL Wireless. Cost you 500+ quid depending on options. Its an enterprise class small office firewall with built in wireless and ADSL modem. Far far easier to configure than a CISCO router via the web GUI, and in my opinion is a far far better firewall than a CISCO PIX that is in a similar class. Dont get me wrong I aint saying it will be easy for you, but I am sure if you know a bit about computers and can read the manual you could sort it out. There is even a version with built in trend AV filtering.