Moving existing site to Squarespace

Site URL: http://purple-radio.co.uk

Hi all

Total newbie and first time site builder here but keen to learn so all advice much appreciated.

Which level of subscription would you recommend when switching an existing site - www.purple-radio.co.uk - to Squarespace? Main function of our site would be to host a feature packed chat room for our radio station listeners and display code provided by the service that hosts our audio stream.

Thanks in advance.