I have just Purchased Sony STRDA1200ES with Q Acoustics 1030 fronts and 1000c centre. I am looking to add a new sub next and then recable the whole setup. Is the Q acoustics Si Sub worth the extra £80 compared to the standard S (Both on Superfi). Cabling wise what level should I go for. I heard that unless your amp and speakers are in the £2000 plus bracket then there no point in spending lots of money on the cables. I will need 2 optical cables, a sub lead and all new speaker cable (Prob up to 30m). Also is bare wire vs banana plugs worth all the extra? Which brands should I stear towards and which avoid??