Sir av_phile1 thanks for the quick reply. Since I will only purchase the Tower (Euros8) and will retain the rear and center speakers which are all 8 ohms will this create a problem. 
Answering on behalf of Sir AV:
Bro vtec3,
This would not cause any problems since the speakers have a higher impedance than the amplifier when it is switched at this position. As it says there at the back of your amp, for the center and rear speakers, 6 Ohms Minimum. That means, it can handle speakers with an impedance of 6 Ohms or higher, since 8 ohms is higher than 6 Ohms, then you wouldn't have any problems. Then with your fronts, since I'm assuming you're only using just one pair of speakers, your Euros are rated at 6 Ohms, your amp can handle 4 Ohms or higher, and since 6 Ohms is higher than 4 Ohms, you won't have any problems. Again, I stress, that is if you only use just one pair of front speakers, since using two pairs would oblige you to use speakers with impedance ratings of 8 Ohms or higher on both pairs.
As I usually suggest, think of impedances as water lines and faucets. Water lines being amplifiers and faucets being speakers. If you have, let's say a 1 inch water line (tubo ng tubig), and you attach a 1 inch faucet to it, bagay na bagay, di ba? If you attach a 1/2 inch faucet to the same 1 inch tubo, okay pa rin, the pressure of the water would even be stronger, right? So, all the better. But if you attach a 2 inch faucet to the same 1 inch water line, may lalabas pa rin na tubig but the pressure ain't that high anymore. I hope my correlation helps you see much clearer.
Sir AV, thanks for obliging me.
God Bless, my brothers.
