How to match two different kind of sofas in the living room?

we have a medium sized living room and have golden and navy blue patched 7 seater sofa with 4 coffee tables and one standing lamp.the other day my husband saw these butiful white and black colored single seater sofas and he bought 3 of them.now i dont like it to be put with ma older sofas,but he insists..can anyone tel me how can i place all of them and of course have a tv stand with a 40in lcd ...i think ma living room gonna become crowded..please help...