Well I have a Netgear DG834GT (802.11G rated, ADSL combined modem-router), its about 3 years old, never been a problem.
Pretty easy to set up firewall rules if you want to run multiplayer as the server in il2. Runs fairly hot on top, but its on all the time, wireless range is average I'd say, if that's something you may use, depends on where in the house you are, thick walls or kitchen appliances 'en route' affect it the most, and distance of course. I'm connected by cat5 on my gaming PC so not a worry for me.
There's probably a 'N' version now with better range. Can't tell you if the newer models are as good build/reliable, check the comments on Amazon, for starters, but certainly their menus within the router setup, diagnostics, wireless settings and firewall rules are all pretty starightforward.
Hope this helps, not exactly loaded with info I know.
