Surround sound built into my pc and bose surround small speakers for the win. Not the best setup but pretty amazing for pretty dam cheap!
I do have a sony reciever though only thing is I play Blu ray movies off my pc so I only get true surround when I watch movies BUT when I watch tv or play PS3 I just have the reciever and speakers sound not TRUE surround but I'd rather save it for the movie watching anyways.