building a 7.2 setup

[Anirudh65]

what practical roadmap should i follow to build my existing hifi system(Denon 2600 AVR with Elac Debut B6.2 bookshelf speakers) to say a 7.2 hi fi system adding components as per my budget in a phased manner..like adding surrounds, rear speakers, subwoofer floor standers, centre speakers etc.in which way should these components be added. im on the existing setup since almost 6 years and only listen to streamed music. this hifi system willl continue to play strfeamed music..am not interested in any movies etc.thanks.Anirudh