Hey, Looking to upgrade my home cinema setup shortly and need some advice. I'm looking to spend between £300-400 on the amp and another £250-300 on the sub I'm currently using a pretty dated Pioneer package (the receiver is the VSX-C100) so anything would probably be a decent upgrade. Speaker-wise, i've got newer Mordaunt Short ALUMNI bookshelf/centre speakers right now which I probably won't be changing for the time being, though the rears are from the Pioneer package so could do with an upgrade. Im liking what i'm hearing about the Onkyo TX-NR609, likewise the Denon AVR2312 as well the cheaper Pioneer VSX921 for it's features. Any specific recommendations out of these? Subs I haven't really looked at in as much detail but the Cambridge Audio MINX X200 is around my budget. Any other good options? Also another totally n00b question - if I were to buy new floorstanding front speakers could my Mordaunt Short bookshelf speakers be used as rears effectively or do you need rear specific speakers?