In my parents house which is over 4 floors, I installed structured cabling with wall sockets throughout the house into a patch panel in the utility room - it made life so much easier - despite having a wireless connection and a repeater it was much less stress accessing the server from a wired 1gb connection.
In my current flat I have a solid connection to my switch where my server and main internet devices connect to - my server does all my downloads/uploads/usenet etc... so I can get the full bandwidth as a result even with the thompson router which is 100mb - but since my connection is ~74ish it's fine! However over the wireless, I don't get much more than 34 despite the wireless being connected at 65+. It's just the way wireless is.
I personally love wifi for convenience, but if you have a fixed computer, and server/systems in place, wired will always be king - and 1gb networking kit is so cheap and makes life SO much easier - especially when copying large files.