I haven't checked the spec of any of this gear yet, but if you are going to be "always online" (OK, read "mostly online"
) you will
definitely need a firewall. You may get this in your ADSL kit, but if not, you'll should consider running a dedicated firewall box. I've never been convinced about the robustness of the ones that come with Windoze...
www.smoothwall.org will run on the most basic spec of virtually-junked hardware
. Looking, for the first time, at the logs of stuff that your firewall has (or should have) rejected, will come as somehting of a shock
[Edited to add] Agree with AMOFW, Netgear kit is good, have had a few bad experiences with D-Link kit, no experience of the Draytek ...