Yasa, the general suggestion is to have the speakers slightly toed-in so that the tweeters are pointing at your ears. With the relatively long distance away for that 8' separation you're not very far off the tweeter axis even if the speakers are parallel, so it might make little or no difference. If your room can accommodate it, a few feet more separation(with toe-in)might be in order.

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Enjoy the music, not the equipment.