All you've mentioned, plus probably edition38 although it's offline at the moment, should be up and running again soon.
You could always try ebay, seen wuite a lot of 16v's on there, you can still go and view them so you're not buying blind.
I paid £3300 for my 16v in Sep '05. Quite steep but I knew i was getting a 1 lady owner car with 70k and never wanted for anything.
Really it depends how much peace of mind you want.