Hi, Im looking to buy a yammy dsp e800 to go with my Marantz Pm 66SE KI Sig. amp. I need some rear speakers and a centre to go with my existing Heybrook Heylos. I like the sound of the halos and would like to keep them as my front pair. Ive only got about 300 to 350 for twor rears and a centre. I cant afford a sub yet but the heylos go quite low. My room measures about 6m by 4.5m. Any ideas? I dont know where to start!