Ive travelled south a few times and visited the most popular beaches such as Agonda and Palolem and I liked them well enough, but in my opionion its greatly exaggerated as to how nice they are (please dont shoot me down in flames, this is only my opinion )
We stayed here Gemma - top quality, really quiet. We did however book it through friends who knew one of the guys running it and got it cheap at £30pp per night, which included transport to and from Candolim, and evening meal/bbq and breakfast the following morning, but that was 3 years ago - any more than this and I would say they are asking too much. I know a few would say £30 is expensive but more than one night (wish we had a week there..) and you could possibly negotiate. http://www.colabeach.com/index.html
Patnem I have considered in the past so might have a look at that again.
Spike, that looks gorgeous. Saved the link to my favourites to look further and perhaps contact them
Ever though of jumping on a train and seeing some beaches of karnataka beautiful beaches to be seen from Karwar all the way down to kerela Gokarna has some great beaches but is getting a little busy but there really are great beaches in karnataka and they are just a few hours away go and see before they become the same way as Goa