Need some help with choosing Polk Equipment

[MasterSamurai]

Hello good people of the forum.

I am about to choose som audio equipment and need some advice.
I have checked out diffrent speakers and now Its is up to three diffrent speakers to choose from.

Polk Audio RTi A7 (http://www.polkaudio.com/homeaudio/r...?s=rtia7#rtia7)
Polk Audio RTi A9 (http://www.polkaudio.com/homeaudio/r...?s=rtia7#rtia9)
Polk Audio RTi8 (http://www.polkaudio.com/homeaudio/p...s/recent/rti8/)

I have also been offered this sub at a good price so I'm condisering this as well.

Polk Audio DSW MicroPRO 1000 (http://www.polkaudio.com/homeaudio/d...swmicropro1000)

Whitch would you choose?

I also need some help with buying a reciever for these babies. Now I have spend a good amount of my spending money on the speakers (If I choose these) so I need a good (and cheap) reciever that I can upgrade with an external amplifier when my money sais I can..