[Russ]

You should get the 250 modem - clear blue in colour. The engineer will ensure that there's a connection from your modem to outside - he won't have anything to do with what goes on on your computer unless he's willing to do it off his own back which might happen but is rare.

Best thing to do is post back on here once you're up and running. Most importantly, remember the service you're about to have is up to 10meg.