For broadband alone, I would highly recommend Eclipse Broadband :
http://www.eclipse.net.uk/index.cfm?id=fixedma in_res
From �14.99 a month you have a 20GB download limit (only from 6pm-12am, any other time it's unlimited).
As for the whole combi deals, I know that Sky broadband (with deals) came 3rd from last in the Which? magazine trail. And also the Virgin package (standard) is pretty much like freeview but with the addition of Sky Movies and Sky Sports.
Personally I'd just stick to broadband at the moment.