Advice regarding upgrading of speakers

[Orca44]

I currently have the following speaker set, jvc sx-f300wd (This includes 2 floor standers, a centre and 2 rears, as well as a sub) which I bought about 5 years ago.  Looking at Wharfedale Obsidian 600 Cinema Package special that is available, will this be a decent upgrade or not worth the R 3300 that the Wharfdales cost?

Currently using the speakers for 70% tv. The rest movies, music and Xbox.

Below is a link to an image of the JVC floor standers
http://www.google.co.za/imgres?hl=en&sa=X&tbo=d&biw=1324&bih=949&tbm=isch&tbnid=-RUOMmKtG9uPUM:&imgrefurl=http://www.productreview.com.au/p/jvc-sxf300wd.html&docid=c3983p9TgYkQeM&imgurl=http://static.productreview.com.au/pr.products/43854_jvc_sxf300wd.jpg&w=211&h=364&ei=nbcSUcGoBa6r0AWCkICIAg&zoom=1&ved=1t:3588,r:1,s:0,i:84

Thanks

 

[jeinnor]

 

[Orca44]

 

[Chingy]

 

[adie]