Pl need guidance on importance of rear speakers in 5.1 setup

[poppy]

Dear friends I had ordered for Dali Zensor7 5.1 setup .in this rear speakers are Zensor 1 which are bookshelf .I was going to some site and seen wharefadel 10.DFS rear speakers I like the looks.
Now my question is how important the rear speakers are in 5.1 HT setup and is mix and match is good I had not heard wharfedale but like the looks as they are compact and looks good on wall compare to bookshelf.

My friends can u pl guide me on this.

 

[dheerajin]

really speaking..only center speaker and subwoofer holds important position...and rear ones are least important..and you cant feel the difference in sounding,,in same price segment.