Local independent Hi-fi dealers should stock the kit but Sonos offer a 100 day money back guarantee if purchased direct from them. So what's better than a demo in your own home? :)
Radio Sussex is not allowed to broadcast league games over its Internet stream. The only way you can listen via the Internet is by buying a subscription to Seagulls player. Very occasionally Radio 5 live will have commentary on a game that is broadcast over the Internet.