@scrappydue
i found an old post from you, you said for more then 4' behind the listening position use bookshelf, else go with the surround. that is a good solution!
but for now i stay with 5.1 because my girlfriend and me, we´re planning to buy a house. So i will see how much space i will get there
maybe then i have enough room to go with 2 more 280F as rear but we will see. at the moment in my room i would go with the 150's because all other speakers (center, surround) are equipped with 5,25" woofers.
@all
all advices are welcome! and many thanks for your posts.
Greetings