i currently have a shuttle sn25p and have to use onboard sound. i was wonder what speaker setup i should use 2.1? 5.1? and if i need a reciever (or worth it) i wanna spend around 100 bucks. i have nice headphones (sennheiser HD555) but if im in my room with others i want good speakers so its not crappy when i turn it up. i was looking at the Klipsch 2.1's and the altec lansing 2100's. thanks for any advice in advance.