Yeah, you can't just connect some random speakers to serve as surrounds for a soundbar. Soundbars with surround sound usually come with their own surround speakers and won't work with others. Sounds to me like your purposes would be well served with just a sound bar or a very simple 2.1 or 3.1 channel system. There is no point in setting up surround speakers when the front is going to be heavily compromised. I would look at getting a cheap AVR, some cheap but decent bookshelf speakers, and a small subwoofer.