Higher end speakers mixed with lower end speakers.

[theleftmethod]

Basically I am thinking about combining my two RTI/12 Polks

http://www.polkaudio.com/homeaudio/specs/recent/rti12/

with the Center and rear speakers from my Logitech Z5500 system

http://www.logitech.com/en-us/speake...rs/devices/224

And my Polk DSW Pro 600 sub


all connected through my Yamaha RXV 365

My concern is however that the lower quality speakers from my Z5500 wont sound as good when paired (and compared) with my two Polks during 5.1 surround sound playback. This will be in a theater room with ideal speaker placement. However I can be some what of a sound critic. and I just don't want to take the time to set this up to find that the low end speakers tones don't match or sound right with the higher end Polks quality.

Dose anyone have any advice? I am new to surround sound and honestly don't know if my concerns are even valid.

So will these speakers sound fine together? or will the sound quality be noticeably different?