In reply to Rowancb:
Hi,
There are many companies to choose from, and I'm sure you will get many suggestion from folks here, I know of a couple but don't have the details to hand - I can get them to you if no-one else comes up trumps.
I would advise that you do use a trekking company rather than doing it yourselves as this is the chief economy of the area and will really help to support the communities. My wife and I did the Annapurna Base Camp trek and we employed both a guide and a porter, even though we didn't really need either.
You will love it, I spent three months there and made some great Nepalese friends.
Cheers, Tony
Post edited at 14:09